Updated Raster (markdown)
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Raster.md
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Raster.md
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@ -6,15 +6,15 @@
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This plugin supports reading tiff and geotiff files.
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This plugin supports reading tiff and geotiff files.
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Tiled or Stripped tiff files are required and when rasters are small < 200-300 MB this driver is faster that the [wiki:GDAL] plugin.
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Tiled or Stripped tiff files are required and when rasters are small < 200-300 MB this driver is faster that the [[GDAL]] plugin.
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If files are larger it is recommended to build GDAL overviews (with gdaladdo command) and instead read with the [wiki:GDAL] plugin.
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If files are larger it is recommended to build GDAL overviews (with gdaladdo command) and instead read with the [[GDAL]] plugin.
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* Note: overviews support is available only in Mapnik >= 0.7.0.
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* Note: overviews support is available only in Mapnik >= 0.7.0.
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A drawback(or advantage!) of this plugin is that it requires manually setting the file bounds.
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A drawback(or advantage!) of this plugin is that it requires manually setting the file bounds.
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* hint: create a GDAL datasource from your tiff in python, call the envelope() method to get the bounds, and use those.
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* hint: create a GDAL datasource from your tiff in python, call the envelope() method to get the bounds, and use those.
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For other plugins see: PluginArchitecture
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For other plugins see: [[PluginArchitecture]]
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# Installation
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# Installation
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@ -27,15 +27,56 @@ To check if the raster plugin built and was installed correctly you can do:
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# Parameters
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# Parameters
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|| *parameter* || *value* || *description* || *default* ||
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|| file || string || geotiff file path || ||
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<table>
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|| base || string || optional base path where to search for the tiff raster file || ||
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<tr>
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|| lox || double || lower x corner of the image in map coordinates || ||
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<td> <strong>parameter</strong> </td>
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|| loy || double || lower y corner of the image in map coordinates || ||
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<td> <strong>value</strong> </td>
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|| hix || double || upper x corner of the image in map coordinates || ||
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<td> <strong>description</strong> </td>
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|| hiy || double || upper y corner of the image in map coordinates || ||
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<td> <strong>default</strong> </td>
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|| extent || string || extent of the image in map coordinates, comma or space separated (at least <lox> <loy> <hix> <hiy> or <extent> should be passed) || ||
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</tr>
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|| format || string || image format to use, currently only tiff is supported || tiff ||
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<tr>
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<td> file </td>
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<td> string </td>
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<td> geotiff file path </td>
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</tr>
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<tr>
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<td> base </td>
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<td> string </td>
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<td> optional base path where to search for the tiff raster file </td>
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</tr>
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<tr>
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<td> lox </td>
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<td> double </td>
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<td> lower x corner of the image in map coordinates </td>
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</tr>
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<tr>
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<td> loy </td>
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<td> double </td>
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<td> lower y corner of the image in map coordinates </td>
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</tr>
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<tr>
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<td> hix </td>
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<td> double </td>
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<td> upper x corner of the image in map coordinates </td>
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</tr>
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<tr>
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<td> hiy </td>
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<td> double </td>
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<td> upper y corner of the image in map coordinates </td>
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</tr>
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<tr>
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<td> extent </td>
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<td> string </td>
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<td> extent of the image in map coordinates, comma or space separated (at least <lox> <loy> <hix> <hiy> or <extent> should be passed) </td>
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</tr>
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<tr>
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<td> format </td>
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<td> string </td>
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<td> image format to use, currently only tiff is supported </td>
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<td> tiff </td>
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</tr>
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</table>
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# Styling
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# Styling
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@ -51,7 +92,7 @@ See the docstring at: http://svn.mapnik.org/trunk/docs/api_docs/python/mapnik-mo
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== XML ==
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== XML ==
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```xml
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#!xml
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#!xml
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<!-- NOTE: must be in the same SRS as your map-->
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<!-- NOTE: must be in the same SRS as your map-->
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<Layer name="Raster">
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<Layer name="Raster">
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@ -65,6 +106,7 @@ See the docstring at: http://svn.mapnik.org/trunk/docs/api_docs/python/mapnik-mo
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<Parameter name="hiy">max_y</Parameter>
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<Parameter name="hiy">max_y</Parameter>
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</Datasource>
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</Datasource>
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</Layer>
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</Layer>
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```
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## C++
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## C++
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