Method for rapidly generating forest land thematic map tiles under distributed cloud environment
A thematic map and cloud environment technology, applied in the field of rapid generation of forestland thematic map tiles, can solve problems such as incompetence and inefficiency, and achieve the effect of fast processing speed and high execution efficiency.
Active Publication Date: 2017-01-04
国家林业和草原局林草调查规划院
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Problems solved by technology
[0003] In order to display these woodland thematic map data, it is necessary to generate tiles, but the traditional woodland thematic map tile generation technology is mostly based on single machine generation or multi-machine tile generation based on manual splitting. However, such Work efficiency is not efficient, and it is often incompetent in the face of today's massive, multi-source projected forest land thematic map data
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[0035] The present invention will be further described below through specific embodiments and in conjunction with the accompanying drawings.
[0036] figure 1 The flow chart of the method for rapidly generating forestland thematic map tiles in a distributed cloud environment is shown as an example. Specifically include the following steps:
[0037] 1) The user uploads the thematic map data to be processed to the server data node through the file transfer protocol ftp, and uploads the data path of the thematic map to the distributed file system HDFS cluster through the system terminal;
[0038] 2) The user starts the forestland thematic map projection and format conversion processing function on the server data node from the system terminal, and inputs the well-known ID (WKID) of the target projection;
[0039] 3) After the forestland thematic map projection and format conversion processing function on the server data node is started, under the MapReduce parallel processing f...
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The invention discloses a method for rapidly generating forest land thematic map tiles under a distributed cloud environment. The method comprises the following steps of: uploading thematic map data to a server data node in a ftp mode, and uploading a thematic map data route into an HDFS cluster by virtue of a system terminal; starting up a forest land thematic map projection and format conversion processing function on the server data node through the system terminal, and inputting the known ID (WKID) of a target projection; converting the forest land thematic map data on the server data node into unified projection coordinates under a MapReduce parallel processing frame, and outputting the forest land thematic map data in a known character-form WKT format; starting up a forest land thematic map cutting and rasterization function on the server data node through the system terminal, and inputting the number of layering grades; and under the MapReduce parallel processing frame, reading the number of layering grades, and cutting and rasterizing the forest land thematic map data into tiles. The method has quite important practical application values in the aspect of efficiently generating forest land thematic map data tiles.
Description
technical field [0001] The invention relates to a technology for quickly generating woodland thematic map tiles. In particular, it relates to a technology for rapidly generating forestland thematic map tiles in a cloud environment. Background technique [0002] Forest land data reflects the current situation and changes of forest resources, and is an important basis for making ecological construction management decisions in my country. Since the establishment of a three-level forest resources monitoring and management survey system in my country in the 1970s, a large number of reliable data on forest resources have been obtained, which has made important contributions to the supervision of my country's forest resources. With the advancement of the national forest land "one map" system of the State Forestry Administration, the collection of forest land boundary data has been completed, of which only the forest land boundary thematic map data has reached 67.3888 million piece...
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Login to View More IPC IPC(8): G06F17/30
CPCG06F16/182G06F16/29
Inventor 张煜星许等平黄国胜任怡罗鹏王雪军杜震洪王六如
Owner 国家林业和草原局林草调查规划院