Build your own GIS data center

Build your own GIS data center   Author: Beijing competing upstream technology Source: www.2first.cn updated: Views: 1022

In the new curriculum reform, the geography teaching course has a 3 S (gis gps rs) content, and GIS-assisted geography teaching has an incomparable advantage in other ways, these indicate that GIS is becoming more and more important in geography teaching. Therefore, it is necessary to establish a GIS data center and a data center that supports WebGIS. Its advantages are: 1. Data is centralized to facilitate management and facilitate teaching. There are a lot of GIS data available on the Internet, which is not described as full-blown, but not all of them are suitable for geography teaching in our middle school. By establishing our own GIS time center, centralized management of the data required for teaching can greatly facilitate the use of GIS in geography teaching. 2. Data Access is faster and more convenient. To use GIS data, there is always all data on the network, but the network data in many places limits the use of GIS. At the current speed of the Internet-even if it is using a broadband network, the speed is not ideal for classroom teaching, and the stability is not guaranteed. If you build your own GIS data center on your school's campus network, the speed and stability of obtaining GIS data are guaranteed. 3. It can better support the construction of its own thematic maps and local maps. 4. The client is more convenient to use. Of course, commercial software can be used to create a GIS Data Center Server. ESRI and MapInfo have powerful products, but we will not mention them here. I still consider using free open source GIS software to build this GIS data center. The following software products are available for consideration: 1 GeoServer (http://www.geoserver.org): This is the first choice. 2 MapServer: A mature product with a long history. 3. Postgresql + PostGIS: The best choice for database types. 4 DeeGree: not clear. 5 mapguide (https://mapguide.osgeo.org/): the famous Autodesk commercial products, now open source. Among the above five solutions, I did not test 4 and 5, and I successfully tested 1, 2, and 3, of which 2 is not difficult to install the configuration, however, to publish GIS data, you need to make its proprietary map file format, which is troublesome. 3. It is a powerful database method, but it may not be very friendly to users, it is troublesome to compile and install the source code. Next we will record the entire process of creating a GIS data center based on Linux + geoserver: 1 first understand what geoserver is: geoserver is a fully functional, open source WFS-T and WMS server following the OGC open standards. Geoserver can be used to publish data as maps/images (implemented using WMS) or directly publish actual data (implemented using WFS). It also provides modifications, delete and add features that take advantage of WFS-T ). 2. install Java Because geoserver is written in Java, you must install Java first. My system is Sarge. I didn't use the standard Debian method to install Java, but like this: 2.1) download j2sdk from the sun website using version 1.4.2. It is said that version 1.5 may cause problems when used with the old geoserver. 2.2) modify the attributes so that the downloaded j2sdk *****. binfile can be executed. 2.3) run the preceding Installation File. 2.4) modify the environment variable. To stop manual modification in the future, you can add the following statement to the/etc/profile file. A safer way is to add it ~. In the bashrc file: Java_home =/root/Java JRE =/root/Java/JRE Path = $ path: $ java_home/bin CLASSPATH =.: JAVA_HOME/lib/tools. jar: JRE/lib/ext ExportJAVA_HOME PATH CLASSPATH 3. Download, install, and run Geoserver. The latest version of 1.3 is said to have fixed the issue of incompatible j2sdk-1.5. Decompress the downloaded Installation File. Go to the geoserver/bin directory and run./startuo. sh. The entire installation and running process is extremely simple. You can enter http: // your geoserver Server IP Address: 8080/geoserver on the client to perform configuration management. 4. Release your own GIS data: 4.1) create a directory under geoserver/conf/data. 4.2) copy the shape file you need --- geoserver certainly supports other data, but shape is the simplest --- copy all to the directory you just created. 4.3) in the browser, select config, the username is admin, And the password is geoserver. 4.4) Data Store New and so on. The interface is very friendly and will not be detailed here. For detailed chart description, see the description file of geoserver: Http://docs.codehaus.org/display/GEOSDOC/User+Tutorial+Shapefile 5 now you can browse your GIS map data in a browser or other clients that support WMS and WFS, such as uDig.

For details about how to implement the GIS project, please consult Beijing zhengupstream Technology Co., Ltd. URL: www.2first.cn Tel: 13581913311 13911607377 Msn: tofirst0001 # hotmail.com Email: gis416 # 126.com

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