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Update parameters with layer_by_sql and extent. Add xml config example for mssql.

Joel Brown 2014-08-19 15:23:27 -07:00
parent 68ab448f4f
commit bacaff5331
1 changed files with 17 additions and 1 deletions
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18
OGR.md

@ -23,9 +23,12 @@ To check if the ogr plugin built and was installed correctly, try the usual Pyth
| base | string | base path where to search for file parameter | |
| layer | string | name of the layer to display (a single ogr datasource can contain multiple layers) | |
| layer_by_index | integer | index of the layer to display, this becomes mandatory if no "layer" parameter is specified | |
| multiple_geometries | boolean | wheter to use multiple different objects or a single one when dealing with multi-objects (this is mainly related to how the label are used in the map, one label for a multi-polygon or one label for each polygon of a multi-polygon)| false |
| layer_by_sql | string | SQL statement to execute against the OGR-datasource. The result set is used as the layer definition.|
| multiple_geometries | boolean | whether to use multiple different objects or a single one when dealing with multi-objects (this is mainly related to how the label are used in the map, one label for a multi-polygon or one label for each polygon of a multi-polygon)| false |
| encoding | string | internal file encoding | utf-8 |
| string | string | optional (replaces *file* parameter) string of literal OGR-datasource data, like GeoJSON |
| extent | string | maximum extent of the layer. should be provided when an extent cannot be automatically determined by OGR |
# Usage
@ -87,6 +90,19 @@ However the best way to discover the layer names is to use the OGR provided util
</Layer>
```
```xml
<Layer name="mssql" srs="+proj=latlong +datum=WGS84">
<StyleName>mssql_style</StyleName>
<Datasource>
<!-- mssql database must contain geometry_columns and spatial_ref_sys metadata tables-->
<Parameter name="type">ogr</Parameter>
<Parameter name="string">MSSQL:server=localhost;database=gis;trusted_connection=yes</Parameter>
<Parameter name="layer_by_sql">SELECT * FROM dbo.planet_osm_line</Parameter>
<Parameter name="extent">-180,-90,180,89.99</Parameter>
</Datasource>
</Layer>
```
## C++
Plugin datasource initialization example code can be found on PluginArchitecture.