JP2010068719A - System for monitoring green space, and delivery method for monitoring green space - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a system for monitoring green spaces enabling most reliable determination based on unified idea even when the green spaces are different in area/season/peripheral environment respectively, and improved in its accuracy as time advances without imposing heavy burden for preliminary arrangement. <P>SOLUTION: The system for monitoring green space is such that a determination system 101 including a designated area DB106 where information related to the designated area whose vegetation is to be monitored is stored, a satellite image DB107 and a map DB108, and a determination criteria maintenance system 110 are connected via public networks 114 to be freely communicated to each other. The determination system 101 includes: a means for extracting a designated area not subjected to determination from the designated area DB106; a means for obtaining determination criteria including an NDVI value and an allowable error from the determination criteria maintenance system 110; and a means for calculating the NDVI value from the satellite image extracted from the satellite image DB107 with respect to the whole of the designated areas to compare the value with the determination criteria. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a green space monitoring system and a green space monitoring and distribution method for monitoring a green space using satellite image data and geographically and hierarchically managed vegetation information for a designated and registered region.

  In recent years, global warming and heat island phenomenon have become social problems. As countermeasures, urban greening including rooftop greening and wall greening has attracted attention. Currently, the national and local governments are taking preferential measures such as tax reductions and grants for greening of rooftops, wall greening, and greening on the grounds through green space agreements. However, regarding the greening of the site, it is important to continuously monitor the changes that occur after the application, such as withering over time from the time of application, or the fact that trees have been cut down. In particular, the green space agreement declares that the green space will be maintained for 5 to 30 years and may receive preferential treatment, which requires continuous monitoring.

  Recently, a vegetation index NDVI (Normalized Difference Vegetation Index) value is extracted from satellite image data of a specified area, and the value is compared with a reference value to evaluate the vegetation activity and diagnose the condition. A system is being proposed and implemented.

FIG. 14 is a block diagram showing an outline of this vegetation monitoring system, in which a data registration unit 1401 for registering satellite image data, an input unit 1402 for inputting various instructions, vegetation index reference data and registered satellite image data. And a storage unit 1403 for storing the designated area, a data processing unit 1404 for controlling the whole, and a display unit 1405 for displaying the result.
In the vegetation monitoring system having such a configuration, when the input unit 1402 instructs the start of vegetation monitoring, the designated region is searched from the storage unit 1403, the latest satellite image data of the corresponding region is called, and the data processing unit 1404 NDVI value is calculated. It is determined whether the vegetation is normal by comparing the calculated NDVI value with a reference value registered in advance. The determined result is displayed on the display unit 1405.
The satellite image is registered from the data registration unit 1401 and stored in the storage unit 1403 at regular intervals.

In addition, as a publicly known technical document related to the present invention, there is Patent Document 1 that adds information from a thermal camera or the like to the above example to enable more accurate vegetation management. Patent Document 2 describes a technique for performing vegetation diagnosis by installing a thermal infrared camera, acquiring data of target vegetation by remotely controlling them, and calculating NDVI from them. Further, Patent Document 3 describes a method for determining a troubled tree near a transmission line using three-dimensional data obtained by an aircraft.
JP 2004-147651 A JP 2007-143490 A JP 11-098634 A

By the way, vegetation does not show the same activity throughout the year, but changes depending on the season, and some of them do not have any activity in winter. In addition, even if the vegetation is the same, its activity may change depending on the region, region, and surrounding environment. However, the NDVI value that is the standard for the degree of vegetation life is often indicated by a single threshold value.
For this reason, monitoring by NDVI can obtain relatively good results for vegetation in the ideal state in the local / season assumed in advance, but the surrounding environment in the designated area is poor and grows slowly. Vegetation, vegetation that has not withered in winter but has very low activity may not be diagnosed properly.
This can be compensated by setting a reference value for NDVI in advance for each month and having such a value for each region. However, when there are multiple reference values like this, it is difficult to determine how far the region should be divided in detail, and it is necessary to calculate the reference values for the conditions in advance. This is very time consuming. Moreover, even if all of them are satisfied, it is difficult to grasp the detailed surrounding environment of the designated area and set the reference value in advance.

  In view of the above situation, the present invention can make the most probable determination from the information obtained at that time, based on a unified idea, even in a situation where the region, season, and surrounding environment are different. It is an object of the present invention to provide a green space monitoring system and a green space monitoring and distribution method that can improve the accuracy with the passage of time without imposing a large load on the preparation of the green space.

In order to solve the above problems, the present invention provides the following configurations.
The invention according to claim 1 is a determination system comprising a designated area database, a satellite image database, and a map database in which designated area related information registered for each designated area for which vegetation is to be monitored is stored,
A green space monitoring system in which a determination criterion management system that gives a determination criterion to the determination system is connected to be freely communicated via a network,
The determination system is configured to extract a specified area that has not been determined from the specified area database;
Means for confirming by the satellite image database whether there is a new one that has not been checked yet in the satellite image including the extracted region;
Means for acquiring a determination criterion including an NDVI value and an allowable error from the determination criterion management system if a target satellite image exists;
After obtaining the determination criterion, a means for calculating an NDVI value from the satellite image extracted from the satellite image database for the entire designated region, and comparing with the determination criterion;
If the difference from the criterion is within the allowable error, it is determined as “no problem”, and if it is out of the allowable error, it is determined that the investigation is necessary, and the result is displayed on the map extracted from the map database as the background. Means for outputting to
If it is determined that an investigation is necessary, an input means for inputting the result of the on-site investigation by a person,
Within the specified area, find the deviation rate between the NDVI value and the reference value of all the points judged as “no problem” in the automatic judgment and implementation survey, find the average and standard deviation, and calculate the NDVI average deviation A means for creating a determination reference value update request frame as a rate, NDVI deviation rate standard deviation;
Means for transmitting the created determination reference value update request frame to the determination reference management system,
When the determination criterion management system receives the determination criterion acquisition request from the determination system, the determination criterion management system specifies the prefecture ID, municipality ID, and designated region ID of the requested region from the reference value request region ID of the reference value request frame. Means,
Use the specified area ID to search monthly for whether or not the specified area level determination reference value exists. If the determination reference value exists, acquire the determination reference. If not, the municipality Use the ID to search monthly for whether or not a city-level criterion value exists, and if it exists, obtain the criterion. If not, use the prefecture ID to determine the city-level criterion If there is a reference value, search for each month, if there is, get its criteria, if there is no prefectural level criteria, means to get the national level criteria,
The present invention provides a green space monitoring system comprising means for transmitting an acquired determination criterion to the determination system.

In the invention according to claim 2, when the determination reference management system receives a determination reference update request from the determination system, the determination reference management system acquires a reference value request area ID from the determination reference value update request frame and disassembles the ID. A means for obtaining a prefecture ID, a municipality ID, and a designated area ID;
First, it is determined whether the designated area exists in the determination reference database using the designated area ID, and if not, means for adding the designated area;
Next, it is confirmed whether there is a determination reference value for the month, and if not, a means for adding a determination reference value newly sent for update,
Means for updating the determination reference value using the NDVI average deviation rate and the NDVI deviation rate standard deviation in the reference value update request frame, if the determination reference value exists;
If you can update the specified area level reference value for the month, you can also update the municipal level and prefecture level in the same way,
Finally, a green space monitoring system according to claim 1, further comprising means for updating the country level.

The invention according to claim 3 is a determination system comprising a designated area database, a satellite image database, and a map database in which designated area related information registered for each designated area for which vegetation is to be monitored is stored,
A green space monitoring and distribution method in which a determination criterion management system for giving a determination criterion to the determination system is connected to be freely communicated via a network,
The determination system extracting a specified area that has not yet been determined from the specified area database;
Checking the satellite image database to see if there is a new one that has not yet been checked in the satellite image containing the extracted region;
If a target satellite image is present, obtaining a criterion including an NDVI value and an allowable error from the criterion management system;
After obtaining the determination criterion, calculating an NDVI value from the satellite image extracted from the satellite image database for the entire designated region, and comparing with the determination criterion;
If the difference from the criterion is within the allowable error, it is determined that there is no problem, and if it is not within the allowable error, it is determined that the investigation is necessary, and the result is displayed on the map extracted from the map database as the background. A step to output to
If it is determined that an investigation is necessary, an input means for inputting the result of the on-site investigation by a person,
Within the specified area, find the deviation rate between the NDVI value and the reference value for all the areas judged to be “no problem” in the automatic judgment and implementation survey, find the average and standard deviation, and calculate the NDVI average deviation. Creating a determination reference value update request frame as a rate, NDVI deviation rate standard deviation;
Transmitting the created determination reference value update request frame to the determination reference management system;
When the determination criterion management system receives a determination criterion acquisition request from the determination system, it specifies the prefecture ID, municipality ID, and specified region ID of the requested region from the reference value request region ID of the reference value request frame. Steps,
Use the specified area ID to search monthly for whether or not a specified area level criterion value exists. If the criterion value exists, obtain the criterion. If not, the municipality Use the ID to search monthly for whether or not a city-level criterion value exists, and if it exists, obtain the criterion. If not, use the prefecture ID to determine the city-level criterion Search for monthly whether or not the reference value exists, and if it exists, obtain the criterion, and if the criterion level does not exist, obtain the national level criterion,
And a step of transmitting the acquired determination criteria to the determination system.

In the invention according to claim 4, when the determination reference management system receives a determination reference update request from the determination system, the determination reference management system acquires a reference value request region ID from the determination reference value update request frame and disassembles the ID. Thus, acquiring the prefecture ID, the municipality ID, and the designated area ID;
First, it is determined whether the specified area exists in the determination reference database using the specified area ID, and if not, adding the specified area;
Next, it is confirmed whether there is a determination reference value for the month, and if it does not exist, a step of newly adding a determination reference value sent for update,
If a determination reference value exists, updating the value using the NDVI average deviation rate and the NDVI deviation rate standard deviation in the reference value update request frame;
If the specified area level reference value for the month can be updated, the same applies to the municipality level and the prefecture level,
Finally, the step of updating the country level is executed, and the green space monitoring and distribution method according to claim 3 is provided.

The green space monitoring system of the present invention has the following effects.
(1) Even in a situation where the region, season, and surrounding environment are different, the most probable vegetation situation can be determined from the information obtained at that time.
(2) It is possible to provide a green space monitoring system and a green space monitoring and distribution method that enable diagnosis of an appropriate vegetation degree without imposing a heavy load on advance preparation and improve the accuracy with the passage of time.

Hereinafter, embodiments of the present invention will be described with reference to the drawings showing examples.
Each system is a computer, and each means is a means realized by reading and executing a necessary computer program by the CPU of each system, and flowcharts thereof are shown in FIGS.
FIG. 1 is a system configuration diagram showing an example of an embodiment of the present invention. This green space monitoring system includes a determination system 101 including a designated area database (DB) 106 and a satellite image database 107, and the determination system 101. The determination reference management system 110 is configured to provide a determination reference to the determination reference management system 110, and the determination reference management system 110 is connected to the determination system 101 via a public network 114. The public line network 114 corresponds to, for example, the Internet, a dedicated line, or a WAN.

  In addition to the designated area database 106 and the satellite image database 107, the judgment system 101 displays a map database 108 used for displaying a map as a background and specifying an address of the designated area, a background map, a designated area, and a vegetation degree judgment result. A display unit 109 is provided.

The specified area database 106 of the determination system 101 stores geographical information of an area for which vegetation is to be monitored.
The satellite image database 107 stores satellite images used for calculating NDVI values of vegetation. Each time a satellite image is taken, it is stored.
Further, in the map database 108, for example, administrative boundary map data indicating boundaries between prefectures and municipalities is registered.

The determination system 101 also includes a satellite image data registration unit 102 that registers a newly acquired satellite image in the satellite image database 107, a vegetation status determination unit 103 that determines the degree of vegetation activity from the satellite image data and vegetation determination criteria, and a determination. A data transmission / reception unit 104 that makes a determination reference data acquisition and update request to the reference management system, and an input unit 105 for inputting various instructions are provided.
As shown in FIG. 2, the designated area related information stored in the designated area database 106 includes a designated area ID 201, a designated area name 202, a prefecture 203, a municipality 204, a designated polygon ID 205, and a vegetation ID 206, and monitors vegetation. Registered for each designated area you want. Among these, the designated polygon ID is an ID for associating the polygon created when registering the designated area, and the polygon itself is separately stored in the map database. The designated area ID 201 is unique within the same prefecture and the same municipality, and all these designated areas are uniquely identified by combining these three fields. The designated area name can be set arbitrarily.

Here, for example, when the designated area is designated in two places in Shinagawa-ku, Tokyo, one place in Shinjuku-ku, Tokyo, one place in Yokohama City, Kanagawa Prefecture, and one place in Chiba City, Chiba Prefecture, a total of five places are shown in FIG. like,
“0001” and “0002” are registered only when there are two designated areas in the same Shinagawa Ward as the designated area ID, and “0001” is registered in all other areas. If the separately registered polygon file names are “P001”, “P002”, “P003”, “P004”, and “P005”, the specified polygon ID can specify the polygon file “P001”, “P002”, “P003”, and “P003”. Values such as “P004” and “P005” are registered. Moreover, ID for specifying the kind of vegetation planted is registered into vegetation ID. Therefore, the area is specified so that it becomes one kind of plant in the area. By registering in this way, the vegetation activity can be determined using the determination criteria prepared for each vegetation.
Even if the designated area is designated as the same area, it is managed as a separate area if it is separately registered.

The criterion management system 110 includes a criterion database 113 for storing criterion, a criterion update unit 111 for updating the criterion according to a request from the determination system 101, and a criterion according to a request from the determination system 101. A data transmission / reception unit 112 used for transmitting data and receiving determination criterion update request data is provided.
As shown in FIG. 3, the determination reference data stored in the determination reference database 113 has a structure such as a national level reference value 301, a prefectural level reference value 302, a municipality level reference value 303, and a designated region level reference value 304. It has become.
In addition, the reference value of each level is stored as a table as shown in FIG. 4, and the country ID 401, name 402, vegetation ID 403, NDVI reference values (January) to (December) 404 to 415 It has a configuration such as an allowable error 416 and holds such records as many as the number of vegetation.
The determination reference database holds such a table for each level as shown in FIG. 5 to cope with changes in reference values for each month and changes in reference values for each region. Further, the allowable error 416 can be set to a different value for each vegetation and each reference value level, and is configured to be able to absorb a variation difference due to vegetation or a variation difference due to a region.
For example, when vegetation A has almost the same NDVI value reference value anywhere in the country, but vegetation B has a very different NDVI value reference value depending on the region, etc. In B, the permissible error at the national level is increased, and a more accurate determination can be made by setting such that the permissible error is reduced as the specification area is refined.

FIG. 6 is a frame configuration diagram of a reference value request transmitted from the determination system 101 to the determination criterion management system 110. When requesting delivery of the judgment reference value managed by the judgment reference management system 110, as shown in FIG. 6B, from the reference value request command 605, the reference value requesting area ID 606, the vegetation ID 607, and the issuer ID 608. Create and send a frame consisting of
Further, as shown in FIG. 6A, the reference value request area ID is formed by combining a country ID 601, a prefecture ID 602, a municipal ID 603, and a designated area ID 604.
Here, the reference value request area ID 606 is made by combining the country ID 601, the prefecture ID 602, the municipality ID 603, and the designated area ID 604 when the reference value is searched in the determination reference management system 110. This is because the information is decomposed into a prefecture ID 602, a municipality ID 603, and a designated area ID 604, and used for searching in order from the highest level.

  FIG. 7 is a frame configuration diagram of a reference value reply that the determination criterion management system 110 transmits to the determination system 101. As shown in FIG. 7, the determination reference value is sent by creating a frame including a transmission destination ID 701, a reference value request area ID 702, a reference value 703, and an allowable error 704.

  FIG. 8 is a frame configuration diagram of an update request transmitted from the determination system 101 to the determination criterion management system 110. When requesting the update of the determination reference value managed by the determination reference management system 110, as shown in FIG. 8, the reference value update command 801, the reference value request area ID 802, the NDVI average deviation rate 803, the NDVI deviation rate standard deviation A frame consisting of 804 is created and transmitted.

Here, the NDVI average deviation rate 803 is the deviation rate from the judgment value of the NDVI value for the data judged to have no problem as a result of judgment by the judgment system 101 using the standard value sent from the judgment standard management system 110. NDVI deviation rate standard deviation 804 is the standard deviation at that time. From these values, how much the reference value should be changed is specified, and the reference value is corrected.
For example, taking the update of the designated area reference value as an example, if the original designated area reference value is 100 and the tolerance is 10, the NDVI average deviation rate 803 is “+ 5%” and the NDVI deviation rate standard deviation 804 Suppose “7” comes. In this case, if it was the second year since the observation was started, the second data was obtained. First, since the average deviation rate is + 5%, the second data is half the influence. 100 × (1 + 0.05 / 2) = 102.5, and the allowable error is 2σ, and similarly, ((10 + 7 × 2) / 2) = 12. In this way, the amount of correction is determined by taking into account the degree of influence according to the number of years that the newly sent data has been collected. The second year is corrected by a half, and the third year is shifted by a third. In addition, the amount of change is further reduced when the standard value is changed at the municipality, prefecture, or country level. For example, the correction amount is limited to 1/10 for the municipal level, 1/100 for the prefecture level, and 1/1000 for the country level.
By such an update operation, it is possible to adjust the update amount from a rough level reference value to a detailed reference value.

The operation of the green space monitoring system configured as described above will be described below.
FIG. 9 is a flowchart showing an outline of the designated area registration process of the determination system 101. The determination system 101 first creates a polygon file of a designated area designated on the map (step 901), and specifies a representative address including a figure drawn by the polygon (step 902). As shown in FIG. 13, the address is specified by using the administrative district including the largest number of designated polygons as a representative address. For example, in FIG. 13, the designated area polygon 1304 is included in the prefecture A 1301 and extends over the municipalities A 1302 and A 1303. In this case, since the area included in the municipality A1302 is larger, the polygon is specified as the municipality A1302 of the prefecture A1301. When the address is specified, the designated area ID is assigned and registered in the designated area registration database 106 together with the representative address (step 903).
The determination system 101 executes the above processing every time a designated area registration processing instruction is received.

  FIG. 10 is a flowchart showing an outline of the vegetation degree determination process of the determination system 101. The determination system 101 first extracts a specified area that has not been determined from the specified area database 106 (step 1001). After the extraction, it is confirmed whether there is a new satellite image including the region that has not been checked yet (step 1002). If it does not exist, the determination regarding the designated area is not performed this time, and the process proceeds to the next designated area existence confirmation (step 1010).

  If the target satellite image exists, first, a determination criterion is acquired from the determination criterion management system 110 (step 1003). When the determination criterion is obtained, the NDVI value is calculated from the satellite image for the entire designated region and compared with the determination criterion. If the difference from the reference is within the allowable error, it is determined that there is no problem, and if the difference is outside the allowable error, it is determined that investigation is necessary (step 1004). The result is output to the display unit 108 using the map as a background (step 1005). If there are some places that indicate “required investigation”, whether or not an on-site investigation is necessary is determined based on a threshold value designated by the user in advance (step 1006). If it is determined that no on-site inspection is necessary, a determination criterion update request (step 1009) to the determination criterion management system 110 is executed. If it is determined that an implementation survey is necessary, an on-site survey is performed by a person (step 1007), and the result is input from the input unit 105 (step 1008).

In the criterion update request to the criterion management system 110 (step 1009), the deviation rate between the NDVI value and the reference value of all the locations determined as “no problem” in the automatic determination and the implementation survey is obtained in the designated area. Find their mean and standard deviation. A frame is created with these values as the NDVI average deviation rate 803 and the NDVI deviation rate standard deviation 804, and transmitted to the criterion management system 110.
Finally, it is confirmed whether there are any other designated areas to be determined (step 1010). If it remains, go back to step 1001;
The determination system 101 executes the above processing every time a vegetation degree determination processing instruction is received.

FIG. 11 is a flowchart illustrating an outline of the determination criterion sending process of the determination criterion management system 110.
The determination criterion management system 110 first determines whether or not a determination criterion acquisition request from the determination system 101 has been received (step 1101). If not received, the determination criterion management system 110 stands by in a reception waiting state.
When the determination criterion acquisition request is received, the prefecture ID, municipality ID, designated region ID, and the like of the requested region are specified from the reference value request region ID of the received reference value request frame (step 1102). A search is made as to whether or not a reference value at the specified area level exists using the specified area ID (step 1103), and if there is, the determination criterion is sent (step 1104). If it does not exist, the municipality ID is used to search whether a municipality level reference value exists (step 1105), and if there is, the judgment criterion is sent (step 1106). If it does not exist, a search is made as to whether or not a prefectural level reference value exists using the prefectural ID (step 1107), and if there is, the determination reference is sent (step 1108). If it does not exist, it sends a national level decision criterion (step 1109). Since national-level judgment criteria are prepared at the beginning, it is assumed that judgment criteria are always found here. When the transmission of the judgment criteria is finished, the process returns to the initial waiting state (step 1101).

Here, since the determination criteria are prepared for each month, the search also checks whether there is data for that month. For example, if all the judgment standards at the municipality level exist except April, and there are judgment standards for all months at the prefectural level, issuing a judgment standard acquisition request at the time of March, Data will be returned, but the standard value at the prefectural level will be sent as of April. And in May, municipalities will be sent.
Although such a method is not good in the sense of unifying the determination reference level, it responds to a request to make a determination based on a highly accurate reference at that time. This is a result of prioritizing accurate judgment of the vegetation status at that time rather than unifying judgment criteria.
The vegetation that requests the reference value is defined by the vegetation ID 607 in the reference value acquisition request frame.
The determination criterion management system 110 executes the above processing every time a determination criterion transmission processing instruction is received.

FIG. 12 is a flowchart showing an outline of the determination criterion update process of the determination criterion management system 110.
The determination criterion management system 110 first determines whether or not a determination criterion update request from the determination system 101 has been received (step 1201), and if not received, waits in a reception waiting state.
When the determination reference update request is received, necessary information is extracted from the reference value update request frame, and the update target is specified (step 1202). First, the reference value request area ID 802 in the reference value update request frame is acquired, and by decomposing the ID, the prefecture ID, the municipality ID, and the specified area ID are acquired. Next, the reference value is updated in order from the lowest level (from the designated area level).
First, a target is searched using the specified area ID, and it is determined whether the specified area exists in the determination criterion database 113 (step 1203). If it does not exist, the designated area is added (step 1204). Next, it is confirmed whether there is a reference value for the month (step 1205). If it does not exist, a new reference value sent for update is added (step 1207). If it exists, the value is updated using the NDVI average deviation rate 803 and the NDVI deviation rate standard deviation 804 in the reference value update request frame (step 1206). As described with reference to FIG. 8, the update method is a method using a calculation formula that takes into account the degree of influence by performing proportional allocation according to the number of years observed so far.
Existing standard value x (1 + NDVI average divergence rate / (years of observation + α)) = updated standard value

(Existing allowable error x (observation years + α-1) + NDVI deviation rate standard deviation × 2) / (observation years + α) = updated tolerance (α: reference level adjustment factor 1 at the specified area level, at the municipal level) (10, 100 at the prefectural level, 1000 at the country level, etc.) This value adjusts how much adjustment is made for one result.)

  If the specified region level reference value for the month can be updated by the above formula, the municipality level and the prefecture level are similarly updated (step 1208). However, only different values of α are used. The value of α used at each level is adjusted from several experimental trials. Finally, the country level is updated (step 1209). Here, as for the country level, since data for all months is prepared from the beginning and there is no ID, it is a separate step.

As described above, the green space monitoring system of the present embodiment has the following effects.
(1) Even if the area, season, and surrounding environment are different, if there is a reference value derived from past information in the specified area, it will be used. Use the reference value. If not, the standard value at the prefectural level is adopted, otherwise the national level value is used. Since the reference value is acquired through such a stage, the vegetation situation can be determined based on the most probable reference value among the reference values including the designated area obtained at that time.
(2) Since only the national level reference values need to be prepared in advance, it is possible to diagnose an appropriate degree of vegetation life without imposing a heavy burden on the advance preparation.
(3) Since the reference value is updated every time one determination is completed, the accuracy can be improved as time passes.

  In the above-described embodiment, the determination reference management system and the determination system are connected by a public line. However, it goes without saying that the present invention can be similarly applied to a connection by a wireless line or a dedicated line. Yes. Moreover, in this embodiment, the prefecture level and the municipality level are set under the standard value at the country level as an example, but this hierarchy can be applied as it is with no more or less problems. Needless to say.

It is a system configuration diagram showing an embodiment of a green space monitoring system according to the present invention. It is a block diagram of the data stored in the designated area database by this invention. It is a related figure between the judgment reference tables of each level in the judgment reference database by this invention. It is a block diagram of the NDVI reference value part in the determination criteria table by this invention. It is the block diagram which closed up ID, a name, and an allowable error in the criterion table of each level by this invention. (A) It is explanatory drawing of the reference value request | requirement area | region ID by this invention. (B) It is a block diagram of the reference value request | requirement flame | frame by this invention. It is a block diagram of a reference value reply frame according to the present invention. It is a block diagram of a reference value update request frame according to the present invention. It is a flowchart which shows the outline | summary of the designated area registration process of the determination system by this invention. It is a flowchart which shows the vegetation degree determination process of the determination system by this invention. It is a flowchart which shows the criteria sending process of the criteria management system by this invention. It is a flowchart which shows the criteria update process of the criteria management system by this invention. It is explanatory drawing of the method of determining the prefecture and municipality to which it belongs at the time of performing designation | designated area | region registration by this invention. It is a schematic block diagram of the vegetation monitoring system by a prior art example.

Explanation of symbols

101 Judgment System 106 Specified Area Database 107 Satellite Image Database 108 Map Database 110 Judgment Criteria Management System 113 Judgment Criteria Database

Claims (4)

A determination system comprising a specified area database, a satellite image database, and a map database in which specified area-related information registered for each specified area to be monitored for vegetation is stored;
A green space monitoring system in which a determination criterion management system that gives a determination criterion to the determination system is connected to be freely communicated via a network,
The determination system is configured to extract a specified area that has not been determined from the specified area database;
Means for checking by the satellite image database whether there is a new one that has not yet been checked in the satellite image including the extracted area;
Means for acquiring a determination criterion including an NDVI value and an allowable error from the determination criterion management system if a target satellite image exists;
After obtaining the determination criterion, a means for calculating an NDVI value from the satellite image extracted from the satellite image database for the entire designated region, and comparing with the determination criterion;
If the difference from the criterion is within the allowable error, it is determined that there is no problem, and if it is not within the allowable error, it is determined that the investigation is necessary, and the result is displayed on the map extracted from the map database as the background. Means for outputting to
If it is determined that an investigation is necessary, an input means for inputting the result of the on-site investigation by a person,
Within the specified area, find the deviation rate between the NDVI value and the reference value for all the areas judged to be “no problem” in the automatic judgment and implementation survey, find the average and standard deviation, and calculate the NDVI average deviation. A means for creating a determination reference value update request frame as a rate, NDVI deviation rate standard deviation;
Means for transmitting the created determination reference value update request frame to the determination reference management system,
When the determination criterion management system receives the determination criterion acquisition request from the determination system, the determination criterion management system specifies the prefecture ID, the municipality ID, and the designated region ID of the requested region from the reference value request region ID of the reference value request frame. Means,
Search for each month whether or not there is a determination criterion value at the specified region level using the specified region ID, and if the determination criterion value exists, obtain the determination criterion value, if not, Uses the municipality ID to search monthly for whether or not the judgment level value of the municipality level exists, and if it exists, obtains the judgment standard value. If not, the prefectural level ID is used to obtain the judgment level value. If there is a criterion value at the prefectural level, a national standard criterion value is obtained. Means to
A green space monitoring system, comprising: means for transmitting the acquired determination reference value to the determination system. When the determination reference management system receives a determination reference update request from the determination system, the determination reference management system obtains a reference value request region ID from the determination reference value update request frame, and decomposes the ID to obtain a prefecture ID, a municipality Means for acquiring an ID and a specified area ID;
First, it is determined whether the designated area exists in the determination reference database using the designated area ID, and if not, means for adding the designated area;
Next, it is confirmed whether there is a determination reference value for the month, and if not, a means for adding a determination reference value newly sent for update,
Means for updating the determination reference value using the NDVI average deviation rate and the NDVI deviation rate standard deviation in the reference value update request frame, if the determination reference value exists;
If you can update the specified area level reference value for the month, you can also update the municipal level and prefecture level in the same way,
The green space monitoring system according to claim 1, further comprising means for updating the country level. A determination system comprising a specified area database, a satellite image database, and a map database in which specified area-related information registered for each specified area to be monitored for vegetation is stored;
A green space monitoring and distribution method in which a determination criterion management system for giving a determination criterion to the determination system is connected to be freely communicated via a network,
The determination system extracting a specified area that has not yet been determined from the specified area database;
Checking the satellite image database to see if there is a new one that has not yet been checked in the satellite image containing the extracted region;
If a target satellite image is present, obtaining a criterion including an NDVI value and an allowable error from the criterion management system;
After obtaining the determination criterion, calculating an NDVI value from the satellite image extracted from the satellite image database for the entire designated region, and comparing with the determination criterion;
If the difference from the criterion is within the allowable error, it is determined that there is no problem, and if it is not within the allowable error, it is determined that the investigation is necessary, and the result is displayed on the map extracted from the map database as the background. A step to output to
If it is determined that an investigation is necessary, an input means for inputting the result of the on-site investigation by a person,
Within the specified area, find the deviation rate between the NDVI value and the reference value for all the areas judged to be “no problem” in the automatic judgment and implementation survey, find the average and standard deviation, and calculate the NDVI average deviation. Creating a determination reference value update request frame as a rate, NDVI deviation rate standard deviation;
Transmitting the created determination reference value update request frame to the determination reference management system;
When the determination criterion management system receives a determination criterion acquisition request from the determination system, it specifies the prefecture ID, municipality ID, and specified region ID of the requested region from the reference value request region ID of the reference value request frame. Steps,
Use the specified area ID to search monthly for whether or not a specified area level criterion value exists. If the criterion value exists, obtain the criterion. If not, the municipality Use the ID to search monthly for whether or not a city-level criterion value exists, and if it exists, obtain the criterion. If not, use the prefecture ID to determine the city-level criterion Search for monthly whether or not the reference value exists, and if it exists, obtain the criterion, and if the criterion level does not exist, obtain the national level criterion,
And a step of transmitting the acquired determination criteria to the determination system. When the determination reference management system receives a determination reference update request from the determination system, it acquires a reference value request region ID from the determination reference value update request frame, and disassembles the ID to obtain a prefecture ID, a municipality Obtaining an ID and a specified area ID;
First, it is determined whether the specified area exists in the determination reference database using the specified area ID, and if not, adding the specified area;
Next, it is confirmed whether there is a determination reference value for the month, and if it does not exist, a step of newly adding a determination reference value sent for update,
If a determination reference value exists, updating the value using the NDVI average deviation rate and the NDVI deviation rate standard deviation in the reference value update request frame;
If the specified area level reference value for the month can be updated, the same applies to the municipality level and the prefecture level,
4. The green space monitoring and distribution method according to claim 3, further comprising the step of updating the country level.

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