Basic Concepts
Dernière mise à jour
Dernière mise à jour
This section introduces basic concepts that help you understand how spatial data sources work in JMap Server.
Some spatial data sources support data editing (writing) by JMap Server. This is the case of most DBMS type data sources (PostGIS, Oracle Spatial, etc.). In this manual, each section pertaining to a specific type of data source indicates whether it supports reading only or reading and writing.
File type data sources (SHP, GML, etc.) do not support data editing. However, there is an option allowing you to transform this type of data source into a JMap Spatial data source, which will then allow you to edit spatial and descriptive data in JMap. Once this transformation has been done, the data source will no longer be linked to the original files. All data modifications will have to be performed directly using JMap’s editing tools.
In most data sources that read files, multiple files can be integrated together to form continuous maps. It is frequent for CAD users to split a territory in rectangular tiles. By reading all tile files together, JMap administrators can recreate continuous maps, provided that the files contain the same data structure (geometry, layers and attribute types).
JMap Admin provides a file browser that allows you to navigate through the file system of the server where JMap Server is running in order to select the files to include in the data sources. Local and network storage units can be used, as long as the JMap Server process has access to them.
You can also create user paths. These paths are shortcuts that allow you to save time when browsing the system. They can also be used to write paths that are specific to an operating system, such as Windows UNC (e.g. \myserver\data). To create a user path, you must go to the root of the file system and click on Add user path…
To restrict browsing in the file system, you can define one or more root folders. The JMap administrator will not be able to navigate outside these folders. To do this, you must add a line to the file jmapserver.properties.
Exemple
admin.filebrowser.roots=d:/data1|Data1
In this example, a root folders is created, named Data1.
Accessible through the file browser, the Uploads directory contains files uploaded by all users directly to JMap Server from JMap Admin. If you want to upload a file for use as a spatial data source, click on this folder to access the upload interface.
Enter a name for the file and press Upload. The file will be uploaded to a directory created automatically for your user account. The file is accessible to all user accounts.
System spatial data sources are data sources that are automatically created by JMap to support JMap data source and layer sharing. Normally, these resources do not need to be managed and they are not displayed by default in the list of spatial data sources.
If you wish to display them, you can select Show system data sources in the display settings of the table of the Spatial Data section.
