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dev:gdal [2011/12/14 19:20] admin [GDAL Limitations] |
dev:gdal [2011/12/16 14:03] admin [GDAL Limitations] |
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| ==== GDAL Limitations ==== | ==== GDAL Limitations ==== | ||
| - | GDAL (and some times the underlying file format) imposes limitations on the representation of projections, category names and their corresponding colors. The limitations and their corresponding workaround are listed in the table below: | + | GDAL (and some times the underlying file format) imposes limitations on the representation of projections, category names, their corresponding colors and layer names. The limitations and their corresponding workaround are listed in the table below: |
| ^ Limitation ^ Workaround ^ | ^ Limitation ^ Workaround ^ | ||
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| | Several file formats do not support the storage of category names. | To workaround this limitations, it is possible to use a VRT file or an auxiliary PAM XML file to keep this information. The ERMapper file format has the best support to category names and colors. | | | Several file formats do not support the storage of category names. | To workaround this limitations, it is possible to use a VRT file or an auxiliary PAM XML file to keep this information. The ERMapper file format has the best support to category names and colors. | | ||
| | Several file formats do not support the storage of category colors. | To workaround this limitations, it is possible to use a VRT file or an auxiliary PAM XML file to keep this information. The ERMapper file format has the best support to category names and colors. | | | Several file formats do not support the storage of category colors. | To workaround this limitations, it is possible to use a VRT file or an auxiliary PAM XML file to keep this information. The ERMapper file format has the best support to category names and colors. | | ||
| + | | Several file formats do not support the storage of layer names. | To workaround this limitations, it is possible to use a VRT file or an auxiliary PAM XML file to keep this information. The ERMapper file format also has support to layer names. | | ||
| | The categories must start from 0 and their definition must be contiguous. | Unfortunately, the only way to workaround this limitation is defining dummy categories (Dinamica does this when representing non-contiguous categories in a GDAL supported format) or using the ERMapper file format. | | | The categories must start from 0 and their definition must be contiguous. | Unfortunately, the only way to workaround this limitation is defining dummy categories (Dinamica does this when representing non-contiguous categories in a GDAL supported format) or using the ERMapper file format. | | ||