KR100384992B1 - Automated mapping method - Google Patents

Abstract

The present invention relates to a method for making an automatic map, comprising a map schematic rule DB, which stores various information of an output map based on the map schematic rule, and a map position rule by comparing the exact position numerical map with predetermined files of the map schematic rule DB. An automatic cartography method that is applied to an automatic cartography system that includes cartographic software that automatically creates a map in conformity with the following methods, including an initial file insertion process (S411 to S412), a specific period deletion process (S413), and a symbol in a building. Deletion process (S414), pre-processing result checking process (S415 ~ S416), building object closing process (S421), Hangul Hanja conversion process (S422), road elevation point deletion process (S423), text boundary hidden line process (S424), Contour line drawing process (S425), culvert shape conversion process (S426), linear object weighting process (S427), terrain deformation site and symbol embankment symbolization process (S428), legend insertion process (S429), post-processing result Process (S430-S431), and using the DB which stores information such as line type, symbol, hatch pattern and designated rectangular contour coordinate value, the unique number of the contour and the leaf name according to the National Geographic Map's rules. Automatic production of location digital maps in the form of cartographic maps conforming to the schematic rules of the map provides uniformity of output drawings, shortening of working time, and non-professionals.

Description

Automatic Cartography Method {AUTOMATED MAPPING METHOD}

The present invention relates to an automatic map production method, and more particularly, a database (DB) in which information such as line type, symbol, hatch pattern and designated rectangular contour coordinate value, unique number of the contour, and leaf name are stored according to the map schematic rule. The present invention relates to a method of automatically producing a digital map in exact position using a map mapping rule.

A digital map is a map in which the information of a paper map is digitized into a set of geometric figure elements or pixels in the form of points, lines, and planes, and the production of digital maps is the basis of DB construction, which is the most basic for GIS construction. When the digital map is completed, this data can be used as a base map in various fields such as road management system construction, water supply network construction, sewerage network construction, and city gas network construction.

Types of digital mapping methods are roughly classified into methods using ground surveying systems, aerial photographs or satellite images, and basic topographic maps.

Ground surveying systems are commonly used to map cadastral maps or confined narrow areas that require extremely high accuracy of surveying. Most of the topographic maps are produced by aerial photogrammetry systems.

Among these methods of digital map production, digital map production using topographic maps or original maps is performed by reading the topographic maps or original maps with a raster and then vectorizing them to create digital maps by dividing the vector data into levels or layers according to a certain rule. I mean.

1 is a flowchart of a method for producing a digital map using a topographical map, including automatic input (S11), raster editing (S12), vector conversion (S13), standard code assignment (S14), conversion to geographic coordinates (S15), and exact location editing. (S16), the digital map is completed (S17) process.

First, the existing topographic map is input into the raster data by the scanner, a correction operation for vector converting the raster data is performed, and the raster data is vectorized into MAP S / W (S11 to S13).

Standardized code values are assigned by classifying vectorized data by level or layer of roads, rivers, buildings, farmland, contours, administrative boundaries, etc. according to the numerical map work rules, and the coordinates of the screen generated by vectorizing are applied to the geographic coordinate system. Are converted into the TM and UTM coordinates (S14 to S15).

The digital map is finally completed through an editing process that supplements the exaggeration, transition, and deletion using the results and data obtained from local geographic survey or local supplementary survey (S16 ~ S17).

On the other hand, when producing a map in the form of a map in accordance with the National Geographical Maps rules using the exact position digital map completed as described above, a general mapping system is used.

2 is a schematic diagram of an automatic cartographic system according to the prior art, in which an operator inputs a line type, a symbol, a hatch pattern and a designated rectangular contour coordinate value, a unique number of the contour and a leaf name, and an exact position value. It consists of a mapping software 21 for producing a map in the form of cartography in accordance with the map schematic rules according to the input information of the operator.

However, in the related art, the numerical map is matched with the map schematic rules based on the input information of the operator, so that the technique and accuracy of the production are changed according to the skill of the operator, so that the output drawings are not uniform and the physical and human waste elements are eliminated. There was a big problem.

The present invention has been proposed to solve such a conventional problem, the exact position numerical value using a DB stored in the map type rule information, such as line type, symbol, hatch pattern and the specified rectangular contour coordinate value, the unique number and the leaf name of the contour The purpose is to provide an automatic cartographic method of producing maps in the form of cartographic maps that conform to the National Geographical Mapping Rules.

As one aspect of the present invention for realizing the above object, a map schematic rule DB in which various information of an output map based on a map schematic rule is stored, and a precise position numerical map is compared with predetermined files of the map schematic DB. In the automatic mapping method using an automatic mapping system including mapping software that automatically produces a mapping form conforming to the mapping rules, the closing process of the building object in the output map is performed by the arbitrary position of the numerical map. Selecting a building object, extracting coordinate values of vertices (first point and end point) of the selected building object, determining whether the extracted coordinate values are the same as the coordinates of the first point and the end point, and the first point If the coordinates of the and the endpoint are determined to be the same, deleting the existing building, and closing property at the location where the existing building is deleted. It includes the step of creating a building object.

In another aspect of the present invention, the process of the linearization of the contour lines in the output map may include selecting an explosion road and a contour line of the exact position numerical map, and if there is a road or contour to work among the selected explosion roads and the contour line, Extracting the coordinates of the explosion road and the contour line, and if it is determined that the contour lines intersect the road from the extracted coordinates, cutting the intersection of the contour lines and adding them to the contour work target list; Determining whether both ends of the contour line registered to the road are in contact with the road; and if it is determined that both ends of the contour line are in contact with the road, determining whether the roads that are in contact with the two end points are different line segment objects; Determine if there is no other terrain when searching in the direction orthogonal to the road facing the center of the contour It is when it is determined that there is no step, and the different terrain comprising: hidden-line screen with the contour, a step of restoring the broken portion of the contour lines were not the hidden-line screen.

In still another aspect of the present invention, the process of assigning a weight of the linear object in the output map comprises: selecting a linear object by loading a linear object weight file from the map rule DB, extracting a layer of the selected linear object; Calculating a weight grant value for each layer, offsetting the inside of the building by a weight value if the selected linear object is a periodic building object, and generating a hatch between an offset object and the building, and wherein the selected linear object is a periodic building object. Otherwise, re-weighting the linear object.

1 is a flow chart of a general numerical mapping method;

2 is a schematic diagram of an automatic cartographic system according to the prior art,

3 is a schematic diagram of an automatic cartographic system according to the present invention;

4 is a flow chart for explaining the automatic map production method according to the present invention,

5 is a flow chart of a building object closing process in the automatic map production method according to the present invention,

6A and 6B are exemplary views before and after building object closure;

7 is a flowchart of a contour silver line process in the automatic cartographic mapping method according to the present invention;

8A and 8B are exemplary views before and after contour silver line drawing,

9 is a flowchart illustrating a process for assigning a linear object weight in an automatic map production method according to the present invention;

10A and 10B are exemplary diagrams before and after applying a linear object weight.

There may be a plurality of embodiments of the present invention. Hereinafter, preferred embodiments will be described in detail with reference to the accompanying drawings. This embodiment allows for a better understanding of the objects, features and advantages of the present invention.

3 is a schematic diagram of an automatic cartography system for performing an automatic cartography method according to the present invention.

Automatic mapping system of the present invention, the map schematic rules DB 32 stored information such as the line type, symbol, hatch pattern and the specified rectangular contour coordinate value, the unique number and map name of the map based on the map schematic rules And automatic map production software 31 for automatically producing a precise position digital map in the form of a map conforming to the map rules by comparing the predetermined files of the map rules DB 32.

The cartographic rules DB 32 includes an initial file, a periodic deletion file, a symbol deletion file, a text style file, a Chinese character file, a text boundary file, and a linear object weight that define the representation of each symbol or linear element based on the map schema rules. Schematic files such as files and symbol files are stored and constructed.

4 is an overall flowchart of the automatic map production method according to the present invention, which is roughly divided into a pretreatment step (S411 to S416) and a post-treatment step (S421 to S431).

Each procedure will be described. In the following, the description thereof will be omitted, but all the mapping process is performed by the automatic mapping software 31 which loads the corresponding file from the mapping schematic DB 32 and compares it with the target file of the exact position numerical map.

Initial file insertion process (S411 to S412):

Since the Map Schematic Rule specifies the representation of each symbol or linear element on the map, the target file of the exact position digital map is designated and stored in the Map Schematic Rule DB 32 to produce a map that conforms to this representation. Insert and reflect the initial file to process.

Specific cycle deletion process (S413):

Periods of exact location digital maps need to be deleted during cartography. This should be understood to eliminate periods of relatively insignificant periods in order to facilitate reading of the map component.

After loading the period deletion file stored in the map schema rule DB 32, a string of text existing in the current drawing is extracted and deleted if it matches any record in the loaded file.

Process of deleting symbol in building (S414):

It is prescribed to delete the symbol of a certain layer in an off-premises building among the symbols existing in the exact location numerical map.If the designated symbol exists in the off-building building, the process of converting the out-of-house building to a general house at the same time is also deleted. It is necessary.

After loading the symbol deletion file stored in the map schematic DB (32), each component is selected to perform a predetermined process when the above conditions are met.

Pretreatment Result Confirmation Process (S415 ~ S416):

First, the text existing in the exact numeric map must be changed to the designated form during the mapping process. At this time, the form of the text to be changed will follow the rules of the Map Schematic. In performing the text format change, the text layer and the string form are analyzed to find a case that matches the designed DB, and is changed to the designated form at once.

After loading the text style file that defines the condition for changing the text style, the text of the drawing is searched and the text style file is changed to the specified style if it matches any record in the text style file.

After that, after confirming the results of the pretreatment processes (S411 to S414) performed so far, if it is found to be normal, the process proceeds to the post-treatment process.If abnormality is found, the program is re-executed and the pre-treatment process from the designation of the target file to the deletion of the symbol in the building Do it again.

Building object closing process (S421):

All buildings on the digital map must be closed unless cut off in the street. In this case, we can think of two methods of closing the input by inputting the same coordinates to the first point and the end point, and giving the closing property to the building object.

In the case of the closing process using the first method due to the compatibility of the data format or the like, an inappropriate building shape as shown in FIG. 6A is generated.

In order to solve this irrationality, the present invention searches for a case where the first point and the end point of the building object are input in the same coordinates, deletes the end point, and gives the closing property.

As shown in FIG. 5, in the automatic mapping method according to the present invention, the building object closing process includes selecting an arbitrary building object on the exact numerical location map (S511), and vertices (first point and end point) of the selected building object. Extracting the coordinate values of (S512), determining whether the extracted coordinate values have the same coordinates of the first point and the end point (S513), and if it is determined that the coordinates of the first point and the end point are the same, deleting the existing building ( S514) and generating a building object having a closing property at the position where the existing building is deleted (S515).

When the building object closing process according to the present invention is performed as shown in FIG. 6B, the building object that is completely closed can be seen.

Hangul Hanja conversion process (S422):

Periods written in Korean on digital maps often need to be converted to Chinese characters during the mapping process. For example, in the case of a cycle that represents a place name, it is possible to publish the map after converting to Chinese characters as previously announced.

Conventionally, if the worker is unfamiliar with the Chinese characters or if the Chinese characters are misunderstood, it may cause problems in the accuracy of the map.

In the present invention, a Chinese character file such as a place name as announced in the map schematic DB DB 32 is loaded, and when the Hangul period on the numerical map is the same as the content input in the Chinese character file, it is automatically converted into Chinese characters.

Elevation point deletion process in the road (S423):

Elevation points located on the road must be deleted during the mapping process, so elevation points located on the road of the exact numerical map are automatically deleted at once.

Text boundary hidden line process (S424):

Periodic and linear objects are superimposed on each other on the exact numeric map, but in the process of mapping, it is sometimes necessary to be hidden at the text boundary of the linear lines passing through a specific period.

In the present invention, a text boundary is collectively generated to fit a specified value, so that only the lines to be cut across the boundary are clipped. That is, the text map file is loaded from the map schema DB 32 to process only the corresponding object.

Contour line drawing process (S425):

In the cartographic process, contours crossing the road should be deleted.

In the present invention, the work line is automatically found, the contour line is cut off, and then the batch or automatic processing of the hidden line work for deleting or maintaining the connectivity of the contour line is performed.

As shown in FIG. 7, in the automatic map production method according to the present invention, the contour silver line process includes selecting the explosion road and the contour line of the exact position numerical map (S711), and if the road or the contour line to work exists, the corresponding explosion Extracting the coordinates of the road and the contours (S712 to S713), and if it is determined that the contour lines intersect the road from the extracted coordinates, cutting the intersection of the contour lines and adding them to the contour work target list (S721 to S712 to S713). S723), and determining whether both ends of the contour line registered in the work target list are in contact with the road (S731); and if it is determined that both contour points are in contact with the road, determining whether the roads that are in contact with both ends are different line segment objects ( S732), and when it is determined that the object line is different from each other, determining whether there is no other topography when searching in the orthogonal direction with the road contacting the center of the contour line (S). 733), and if it is determined that there is no other terrain, the step is hidden by the contour (S734), and the step of restoring the broken portion of the contour that is not concealed (S741).

8A is an exemplary view before contour silver line, and FIG. 8B is an exemplary view after contour silver line according to the present invention.

Culvert form conversion process (S426):

The culvert is entered in the form of "c" on the digital map. These culverts must be converted to Arc form during the mapping process. In addition, since the weight is inputted in the converted arc-type culvert, it should be converted to the polyline form, not the arc object.

In the present invention, the culvert is first selected and then converted into an arc-shaped polyline having a radius and weight specified by the user while maintaining the position and angle of the original culvert. First select the linear culvert object, extract the vertex coordinates of the selected linear culvert, calculate the three points that make up the culvert, create an arc with the calculated three points, convert the generated arc to a polyline, and Give the line a weight attribute.

Linear object weighting process (S427):

On a digital map, the weight of all linear objects is given as zero. The weights of these linear objects must be newly given during the cartography to meet the map rules. This conversion process is performed by converting a designated weight value into a linear object weight file for each feature, and then searching for a corresponding linear object and assigning the designated weight.

In this case, when the weight property of the linear object is changed, the weight is given to the building in a building dense area such as a city area, and thus overlaps with each other. In order to compensate for this drawback, the present invention excludes the case where buildings are overlapped with each other by creating a hatch object having a size assigned to a weight designated inside the building.

As shown in FIG. 9, in the automatic mapping method according to the present invention, the process of assigning a linear object weight includes selecting a linear object by loading the linear object weight file from the map schematic DB 32 (S911 to S913); (S914 ˜ S915), by extracting the layer of the selected linear object and calculating the weight grant value for each layer. If the selected linear object is a periodic building object, offset the inside of the building by the weight value and then remove the hatch between the offset object and the building. Generating steps S916 to S918, and reassigning a weight attribute to the linear object if the selected linear object is not a periodic building object (S919).

FIG. 10A is an exemplary diagram before linear object weighting and FIG. 10B is an exemplary diagram after linear object weighting.

Terrain deformation site and symbol embankment symbolization process (S428):

Topographical deformations (castles, cliff rocks), symbolic embankments, etc. shall be expressed in accordance with the map rules. In digital map, it is a task to express the terrain that is represented linearly according to the map diagram. Conventionally, in the present invention, a symbol is generated and inserted at regular intervals. In the present invention, the symbol is expressed in the form of a map diagram, and thus it is easy to modify during finishing work and is a batch and automatic processing method.

In the present invention, in performing such a series of processes, first, the target terrain is selected to determine whether the target terrain exists. If the target terrain exists, the coordinates of the corresponding terrain are extracted, and an insertion point of a shape to be converted is generated and inserted. The terrain shape is created by repositioning the insertion point considering the overlap between positions.

Legend insertion process (S429):

When making a map using a digital map, the leaf name, leaf number, scale, index chart, legend, year of editing and user fees and projections, copyright ownership and publisher and date of printing, latitude and longitude coordinates, teak and teak coordinates, hatch, administration You need to add boundaries.

Post-processing result checking process (S430 ~ S431):

Check the result of the post-processing process (S421 ~ S429) performed so far, and if it is confirmed as normal, complete the work.If any abnormality is found, execute the program again to perform the post-processing process from closing the building object to inserting the legend. .

As described above, the present invention provides a digital map of the exact position using a DB which stores information such as line type, symbol, hatch pattern and designated rectangular contour coordinate value, the unique number of the contour, and the leaf name according to the National Geographical Map Rules. Automatic production in the form of cartography that conforms to the map schematic rules makes the output drawing uniform, shortens working time, and makes it easy for non-specialists to produce maps.

Claims (3)

Output map based on map schematic rule Map map rule DB which stores various information of map and exact position numerical map is compared with the predetermined files of map rule DB and map is automatically produced in map production form conforming to map rule rule In an automated cartographic method using an automated cartographic system that includes production software: The closing process of the building object in the output map, Selecting an arbitrary building object of the exact position numerical map; Extracting coordinate values of vertices (first and end points) of the selected building object; Determining whether the extracted coordinate values are the same as the coordinates of the first point and the end point; Deleting the existing building if it is determined that the coordinates of the first point and the end point are the same; And generating a building object having a closing property at a location where the existing building is deleted. Output map based on map schematic rule Map map rule DB which stores various information of map and exact position numerical map is compared with the predetermined files of map rule DB and map is automatically produced in map production form conforming to map rule rule In an automated cartographic method using an automated cartographic system that includes production software: The silver line process of contours in the output map, Selecting an explosion road and a contour line of the exact position numerical map; Extracting coordinates of the explosion road and the contour line if the road or the contour line to work among the selected explosion roads and contour lines exists; If it is determined that the contour lines intersect with the road from the extracted coordinates, breaking the contour intersection portion and adding it to the contour work target list; Determining whether both endpoints of the contour line registered in the work target list are in contact with the road; If it is determined that both ends of the contour line are in contact with the road, determining whether the roads in contact with both ends are different line segment objects; Determining whether there is no other terrain when searching in a direction orthogonal to a road contacting the center of the contour line when it is determined that the different line segment objects are present; If it is determined that there is no other terrain, the contour line is hidden; Automatic map production method comprising the step of restoring the broken portion of the uncontoured contour line. Output map based on map schematic rule Map map rule DB which stores various information of map and exact position numerical map is compared with the predetermined files of map rule DB and map is automatically produced in map production form conforming to map rule rule In an automated cartographic method using an automated cartographic system that includes production software: Weighting process of the linear object in the output map, Loading a linear object weight file from the map rule DB to select a linear object; Calculating a weight grant value for each layer by extracting the layer of the selected linear object; If the selected linear object is a periodic building object, offsetting the inside of the building by a weight value and generating a hatch between the offset object and the building; If the selected linear object is not a periodic building object, reassigning a weight attribute to the linear object.