CN115599880A - Map legend configuration management method and terminal - Google Patents
Map legend configuration management method and terminal Download PDFInfo
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- CN115599880A CN115599880A CN202211508114.8A CN202211508114A CN115599880A CN 115599880 A CN115599880 A CN 115599880A CN 202211508114 A CN202211508114 A CN 202211508114A CN 115599880 A CN115599880 A CN 115599880A
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Abstract
The invention provides a map legend configuration management method and a terminal, which store map data except legend data; configuring a legend parameter interface, and receiving legend parameter setting according to the legend parameter interface; rendering the map data according to the legend parameter setting; the method stores the map data except the legend data, configures a special legend parameter interface for receiving legend parameter setting sent by a user, renders the map data according to the received legend parameter setting, only stores the map data except the legend data, and renders the map data according to the received legend parameter setting after receiving the external legend parameter setting, thereby realizing flexible configuration and modification of the legend data, being more convenient and fast, needing no manual modification of the legend data in the map data, being capable of automatically completing the updating of the legend data and the rendering of new map example data, needing no storage of a plurality of map data of different legend data, and avoiding data redundancy.
Description
Technical Field
The present invention relates to the field of image processing, and in particular, to a map legend configuration management method and a terminal.
Background
After raster data is rendered in ArcMap software (a map processing component) according to a legend to obtain an effect map, the effect map is published in the ArcMap software to a map server Arcgis Server, the map server cuts the rendered effect map according to WMS specifications to form a map service, then a webgis frame (such as a LEAFLET) is used at the front end to call a map service address, and the rendered raster data effect is displayed on a map. The problems of incapability of responding to user requirement change in time, manual operation, map service storage redundancy (the same map data is rendered twice according to different legends) and the like are caused.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: a map legend configuration management method and a terminal are provided, so that the map legend can be conveniently and quickly modified.
In order to solve the technical problems, the invention adopts a technical scheme that:
a map legend configuration management method, comprising the steps of:
storing map data other than legend data;
configuring a legend parameter interface, and receiving legend parameter setting according to the legend parameter interface;
rendering the map data according to the legend parameter setting.
In order to solve the technical problem, the invention adopts another technical scheme as follows:
a map legend configuration management terminal, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor implementing the following steps when executing the computer program:
storing map data other than legend data;
configuring a legend parameter interface, and receiving legend parameter setting according to the legend parameter interface;
rendering the map data according to the legend parameter setting.
The invention has the beneficial effects that: map data except legend data is stored, a special legend parameter interface is configured to receive legend parameter setting sent by a user, map data is rendered according to the received legend parameter setting, the map data is not saved after the map data is rendered by fixing legend data when a map is generated, only the map data except legend data is saved, dynamic change management can be performed on the legend by receiving external legend parameter setting, namely, the map data can be rendered according to the received legend parameter setting, flexible configuration and modification of the legend data are realized, the map data is convenient and fast, manual modification of the legend data in the map data is not needed, updating of the legend data and rendering of new map example data can be automatically completed, a plurality of map data of different legend data are not needed to be stored, and data redundancy is avoided.
Drawings
FIG. 1 is a flowchart illustrating steps of a method for managing a map legend configuration according to an embodiment of the present invention;
FIG. 2 is a diagram illustrating map data according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an illustrative embodiment of the present invention;
fig. 4 is a schematic structural diagram of a map legend configuration management terminal according to an embodiment of the present invention;
description of reference numerals:
1. a map legend configuration management terminal; 2. a processor; 3. a memory.
Detailed Description
In order to explain technical contents, achieved objects, and effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
Referring to fig. 1, a map legend configuration management method includes the steps of:
storing map data other than legend data;
configuring a legend parameter interface, and receiving legend parameter setting according to the legend parameter interface;
rendering the map data according to the legend parameter setting.
From the above description, the beneficial effects of the present invention are: map data except legend data is stored, a special legend parameter interface is configured to receive legend parameter setting sent by a user, map data is rendered according to the received legend parameter setting, the map data is not saved after the map data is rendered by fixing legend data when a map is generated, only the map data except legend data is saved, dynamic change management can be performed on the legend by receiving external legend parameter setting, namely, the map data can be rendered according to the received legend parameter setting, flexible configuration and modification of the legend data are realized, the map data is convenient and fast, manual modification of the legend data in the map data is not needed, updating of the legend data and rendering of new map example data can be automatically completed, a plurality of map data of different legend data are not needed to be stored, and data redundancy is avoided.
Further, the storing of the map data other than the legend data includes:
slicing map data other than legend data into tile data, the tile data including a tile level, a longitude number, and a latitude number;
storing the tile data.
According to the description, the map data are sliced into the tile data to be stored, the slicing method of the tile data is mature, the tile data can be adapted to different browser ends to be displayed, and the condition of poor data compatibility is avoided.
Further, the configuration legend parameter interface includes:
configuring a numerical range and color values corresponding to the numerical range;
the rendering the map data according to the legend parameter setting includes:
determining corresponding target map data according to the numerical range;
rendering the target map data according to the color value.
As can be seen from the above description, the legend parameter interface includes a numerical range and a color value corresponding to the numerical range, for example, the color value of 0 to 100 is red, and target map data corresponding to the color value is determined according to the numerical range and rendered, so that the legend data and the map data are combined, and the same effect as that of conventional rendering and storing of the legend data and the map data at the same time can be achieved.
Further, when receiving the legend parameter setting according to the legend parameter interface, the method further includes:
receiving a map query request, wherein the map query request comprises a tile level, a longitude number and a latitude number;
the rendering the map data according to the legend parameter setting includes:
inquiring target tile data according to the tile grade, the longitude number and the latitude number;
rendering the target tile data according to the legend parameter setting.
It can be known from the above description that the map query request can be received while the legend parameter setting is received, the corresponding target tile data is confirmed according to the map query request, the target tile data is rendered only according to the legend parameter setting, the whole complete map data does not need to be rendered at the same time, the rendering efficiency is improved, and the waiting time of the user is prevented from being too long.
Further, after rendering the map data according to the legend parameter setting, the method further includes:
converting the rendered map data into bytes;
and returning the bytes.
According to the description, the rendered map data is the png format picture data, the png format picture data is converted into bytes and then transmitted back to the front end to be displayed, the efficiency is high, the rendered map data cannot be directly read out even if the data is intercepted in the transmission process, and the safety is guaranteed to a certain extent.
Referring to fig. 4, a map legend configuration management terminal includes a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor executes the computer program to implement the following steps:
storing map data other than legend data;
configuring a legend parameter interface, and receiving legend parameter setting according to the legend parameter interface;
rendering the map data according to the legend parameter setting.
The invention has the beneficial effects that: map data except legend data is stored, a special legend parameter interface is configured to receive legend parameter settings sent by a user, map data are rendered according to the received legend parameter settings, the map data are not stored after map data are well rendered by fixing legend data when a map is generated, only the map data except the legend data are stored, dynamic change management can be performed on the legend by receiving external legend parameter settings, namely the map data can be rendered according to the received legend parameter settings, flexible configuration and modification of the legend data are realized, and the map data are convenient and rapid to use, manual modification of the legend data in the map data is not needed, updating of the legend data and rendering of new map example data can be automatically completed, the map data of a plurality of different legend data are not needed to be stored, and data redundancy is avoided.
Further, the storing of the map data other than the legend data includes:
slicing map data other than legend data into tile data, the tile data including a tile level, a longitude number, and a latitude number;
storing the tile data.
According to the description, the map data are sliced into the tile data to be stored, the slicing method of the tile data is mature, the tile data can be adapted to different browser ends to be displayed, and the condition of poor data compatibility is avoided.
Further, the configuration legend parameter interface includes:
configuring a numerical range and color values corresponding to the numerical range;
the rendering the map data according to the legend parameter setting includes:
determining corresponding target map data according to the numerical range;
rendering the target map data according to the color value.
As can be seen from the above description, the legend parameter interface includes a numerical range and a color value corresponding to the numerical range, for example, the color value of 0 to 100 is red, and target map data corresponding to the color value is determined according to the numerical range and rendered, so that the legend data and the map data are combined, and the same effect as that of conventional rendering and storing of the legend data and the map data at the same time can be achieved.
Further, when receiving the legend parameter setting according to the legend parameter interface, the method further includes:
receiving a map query request, wherein the map query request comprises a tile level, a longitude number and a latitude number;
the rendering the map data according to the legend parameter setting includes:
inquiring target tile data according to the tile grade, the longitude number and the latitude number;
rendering the target tile data according to the legend parameter setting.
It can be known from the above description that a map query request can be received while legend parameter setting is received, corresponding target tile data is confirmed according to the map query request, the target tile data is rendered only according to the legend parameter setting, the whole complete map data does not need to be rendered at the same time, rendering efficiency is improved, and the waiting time of a user is prevented from being too long.
Further, after rendering the map data according to the legend parameter setting, the method further includes:
converting the rendered map data into bytes;
and returning the bytes.
The map legend configuration management method and the terminal of the invention can be applied to the map which needs to display the legend and the legend display needs to be flexibly changed, and the following description is given by the specific implementation mode:
referring to fig. 1, a first embodiment of the present invention is:
a map legend configuration management method specifically comprises the following steps:
s1, storing map data except legend data, specifically, slicing the map data except legend data into tile data, wherein the tile data comprises tile levels, longitude numbers and latitude numbers; storing the tile data;
in an optional implementation mode, importing the raster data into map software to obtain map data;
please refer to fig. 2, which is pm2.5 raster data of a certain day in fujian province, stored in a file in tif format, where the global raster value range of the raster data is 24.0765-100.1, each pixel of the raster data stores a pm2.5 value of a corresponding time (a certain day) of a location corresponding to the pixel, and the map data shown in fig. 2 is obtained by opening the raster data using ArcMap software;
referring to fig. 2, a parameter Pixel value is a Pixel value of a grid, and is a true value, i.e., original data; simply speaking, this data is stored in the grid, and 57.444 corresponding to the Pixel value is the pm2.5 concentration value of the real-world geographical location corresponding to the grid selected in the box; the parameter Stretched value is a value of ArcMap after stretching the data for better presentation;
the map data shown in fig. 2 is sliced, the existing slicing manner is mature, in this embodiment, the slicing function in the Geotrellis frame is used for slicing, and any slice assembly or frame capable of realizing the slicing function may also be used, which is not limited herein; the tile data obtained after slicing is stored through a distributed file system, so that the tile data has the advantages of high fault tolerance, large data storage amount and high data throughput, efficient reading and writing can be performed under the condition of large external data volume, the distributed file system selects hdfs in the embodiment, other distributed file systems can be used for storage, and limitation is not required;
s2, configuring a legend parameter interface, comprising:
s21, configuring a numerical range and color values corresponding to the numerical range;
s2, self-defined WMTS (Web Map Tile Service) Service is realized, specifically, a WMTS Service interface (namely a legend parameter interface) is compiled by adopting a java programming language springboot frame, the interface adopts a Restful style, and the configuration interface address is as follows: [ means for solving problems ] A/map/getTile/{ z }/{ x }/{ y }/{ led }, where { z } denotes a tile level, { x } denotes a tile number in the longitudinal direction, i.e., a longitude number, { y }: denotes a tile number in the latitude direction, i.e., a latitude number, { led }: representing legend information to be used for receiving legend parameter settings for rendering tile data;
where tile level is a number, the level is typically an integer from 1-20. The longitude number and the latitude number are also usually integers, and the legend parameter implements transmission in json format, which is specifically defined as follows:
[ { "range": from a start value of 1 to an end value of 1",
color ": color value 1" },
a { "range": from a start value of 2 to an end value of 2",
"color": the "color value 2" },
……
specifically, the json format data indicates that a plurality of color values corresponding to the numerical range of "start value 1 to end value 1" are "color value 1", and the color values are the same and are not described herein again;
s3, receiving legend parameter setting according to the legend parameter interface;
after receiving the legend parameter setting, examples of legend parameters { Legend } are:
[{“range”：“0-35”,
“color”：“RGB(0, 228, 0)”},
{“range”: “35-75”,
“color”：“RGB(255, 255, 0)”},
{“range”: “75-115”,
“color”：“RGB(255, 126, 0)”},
{“range”: “115-150”，
“color”：“RGB(255, 0, 0)”},
{“range”: “150-250”，
“color”：“RGB(153, 0, 76)”},
{“range”: “250-1000”，
“color”：“RGB(126, 1, 35)”}]
s4, rendering the map data according to the legend parameter setting, and the method comprises the following steps:
s41, determining corresponding target map data according to the numerical range; rendering the target map data according to the color value;
specifically, the read legend parameter setting is converted into colormap; using colormap to render the target map data to obtain the png format picture data;
s5, converting the rendered map data into bytes; returning the bytes;
specifically, the png format picture data is converted into bytes.
The second embodiment of the invention is as follows:
a map legend configuration management method is different from the first embodiment in that:
the step S3 is executed by:
s0, receiving a map query request, wherein the map query request comprises a tile level, a longitude number and a latitude number;
specifically, the example of the request sent by the front end is as follows: (iii)/map/getTile/8/212/109/[ { "range": 0-35"," color "" RGB (0, 228, 0) "}, {" range ": 35-75", "color": RGB (255, 0) "}, {" range ": 75-115", "color": RGB (255, 126, 0) "}, {" range ": 115-150", "color": RGB (255, 0) "}, {" range ": 150-250", "color": RGB (153, 0, 76) "}, {" range ": 250-1000", "color": RGB (126, 1, 35) "}), wherein the meaning of each parameter is defined in the above text and is not repeated herein;
correspondingly, step S4 includes:
inquiring target tile data according to the tile grade, the longitude number and the latitude number;
rendering the target tile data according to the legend parameter setting, wherein the execution method is the same as that in the step S41, namely replacing the target map data in the step S41 with the target tile data;
referring to fig. 3, for the illustration, the front end may configure the interactive components for receiving the data input by the user according to the requirement, for example, the interactive components may be directly configured on the illustration shown in fig. 3, and the interactive components may be modified by clicking the numbers and color blocks on the illustration, and other interactive modes are only required to transmit the illustration parameters.
Referring to fig. 4, a third embodiment of the present invention is:
a map legend configuration management terminal 1 comprises a processor 2, a memory 3 and a computer program stored on the memory 3 and capable of running on the processor 2, wherein the processor 2 implements the steps in the first embodiment when executing the computer program.
In summary, the present invention provides a map legend configuration management method and terminal, by separating legend data from map data, only slicing and storing basic map data when slicing and storing, and a legend data setting special interface receives legend parameter setting, renders corresponding map data according to the legend parameter setting and then transmits the rendered map data to a front end for display, a rear end automatically implements a WMTS map service interface according to WMTS specifications, reads corresponding slices according to front end parameters and legend information in the interface, renders in real time, and returns to the front end for display; the legend data is freely configured, the method is more convenient and faster, and data redundancy is not generated; meanwhile, a map query request is received while legend parameter setting is received, target tile data are confirmed in the map data according to the map query request, when the front end requests the tile data, tile original data are rendered in real time according to legend information to form a picture to be returned to the front end, namely, only the corresponding target tile data in the query request are rendered, other parts are not rendered, the rendering efficiency is improved, and the use experience of a user is guaranteed.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to the related technical fields, are included in the scope of the present invention.
Claims (10)
1. A map legend configuration management method, comprising the steps of:
storing map data other than legend data;
configuring a legend parameter interface, and receiving legend parameter setting according to the legend parameter interface;
rendering the map data according to the legend parameter setting.
2. A map legend configuration management method according to claim 1, wherein said storing map data other than legend data comprises:
slicing map data other than legend data into tile data, the tile data including a tile level, a longitude number, and a latitude number;
storing the tile data.
3. The method according to claim 1, wherein the configuration legend parameter interface comprises:
configuring a numerical range and color values corresponding to the numerical range;
the rendering the map data according to the legend parameter setting includes:
determining corresponding target map data according to the numerical range;
rendering the target map data according to the color value.
4. The method according to claim 2, wherein said receiving a legend parameter setting according to said legend parameter interface further comprises:
receiving a map query request, wherein the map query request comprises a tile level, a longitude number and a latitude number;
the rendering the map data according to the legend parameter setting includes:
inquiring target tile data according to the tile grade, the longitude number and the latitude number;
rendering the target tile data according to the legend parameter setting.
5. The map legend configuration management method according to any of claims 1-4, further comprising, after rendering said map data according to said legend parameter set:
converting the rendered map data into bytes;
and returning the bytes.
6. A map legend configuration management terminal, comprising a memory, a processor, and a computer program stored on said memory and executable on said processor, wherein said processor implements the following steps when executing said computer program:
storing map data other than legend data;
configuring a legend parameter interface, and receiving legend parameter setting according to the legend parameter interface;
rendering the map data according to the legend parameter setting.
7. The map legend configuration management terminal of claim 6, wherein said storing map data in addition to legend data comprises:
slicing map data other than legend data into tile data, the tile data including a tile level, a longitude number, and a latitude number;
storing the tile data.
8. The map legend configuration management terminal of claim 6, wherein said configuration legend parameter interface comprises:
configuring a numerical range and color values corresponding to the numerical range;
the rendering the map data according to the legend parameter setting includes:
determining corresponding target map data according to the numerical range;
rendering the target map data according to the color value.
9. The terminal according to claim 7, further comprising, when receiving legend parameter settings according to the legend parameter interface:
receiving a map query request, wherein the map query request comprises a tile level, a longitude number and a latitude number;
the rendering the map data according to the legend parameter setting includes:
inquiring target tile data according to the tile grade, the longitude number and the latitude number;
rendering the target tile data according to the legend parameter setting.
10. The terminal according to any one of claims 6 to 9, wherein the step of rendering the map data according to the legend parameter setting further comprises:
converting the rendered map data into bytes;
and returning the bytes.
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