Transform Map
Description
Reprojects a map file according to a set of parameters. It can also crop and reproject a map based on the projection, extents, and cell size of a given format map. This functor is also known by the alias ReprojectMap in EGO Script.
Inputs
| Name | Type | Description |
|---|---|---|
| Input Map Filename | Map Filename Type | Filename of the input map to reproject. |
| Output Map Filename | Map Filename Type | Filename of the resulting reprojected map. Its format is selected from the file extension. |
Optional Inputs
| Name | Type | Description | Default Value |
|---|---|---|---|
| Output Format Map Filename | Map Filename Type | Filename of a format map whose projection, extents, and cell size become the default attributes of the output. Mutually exclusive with Output Map Projection. | .none |
| Output Map Projection | Projection Type | Projection to reproject the input map into; the output's extents and cell size are then computed automatically (either can still be overridden by the relevant ports). Mutually exclusive with Output Format Map Filename. | .none |
| Output Map Cell Type | Cell Type Type | Cell type of the output map. Unsigned 1-Bit Integer and Signed 8-Bit Integer are both treated as Unsigned 8-Bit Integer for this functor. | Signed 32 Bit Integer |
| Output Map Null Value | Null Value Type | Null value of the output map. | .default |
| Resampling Method | Enum Type | Resampling method used to compute output values from the input map: Nearest, Bilinear, Cubic, Cubic Spline, Lanzos, Average, Mode, Maximum, Minimum, Median, 1st Quartile, or 3rd Quartile. This is an advanced port. | Nearest |
| Additional Input Map Null Value | Null Value Type | Additional value to treat as null in the input map, alongside its own null value if it has one. This is an advanced port. | .none |
| Input Map Projection | Projection Type | Projection to assume for the input map, overriding its own. When not given, the input map's own projection is used. This is an advanced port. | .none |
| Output Map Lines | Positive Integer Value Type | Number of lines of the output map. Must be given together with Output Map Columns; mutually exclusive with Output Map Cell Width/Height. This is an advanced port. | .none |
| Output Map Columns | Positive Integer Value Type | Number of columns of the output map. Must be given together with Output Map Lines; mutually exclusive with Output Map Cell Width/Height. This is an advanced port. | .none |
| Output Map Cell Width | Real Value Type | Cell width of the output map, in units compatible with its projection. Must be given together with Output Map Cell Height; mutually exclusive with Output Map Lines/Columns. This is an advanced port. | .none |
| Output Map Cell Height | Real Value Type | Cell height of the output map, in units compatible with its projection. Must be given together with Output Map Cell Width/Height; mutually exclusive with Output Map Lines/Columns. This is an advanced port. | .none |
| Use Compression | Boolean Value Type | If true, the output map is compressed, for formats that support it (GeoTiff and HFA; ignored for other formats). This is an advanced port. | Yes |
| Additional GDAL Warp Arguments | String Type | Additional arguments passed to the underlying gdalwarp invocation, appended after every other argument. This is an advanced port. | “” |
| Additional GDAL Translate Arguments | String Type | Additional arguments passed to the underlying gdal_translate invocation, appended after every other argument. This is an advanced port. | “” |
Outputs
| Name | Type | Description |
|---|---|---|
| Output Map Filename | Map Filename Type | Same filename given to the Output Map Filename input port. |
Group
Notes
This functor wraps the GDAL library utilities GDAL Warp and GDAL Translate: GDAL Warp is used to reproject the map, and GDAL Translate is used to clip the reprojected map to the boundaries of a given mask.
Categorization information present in the input map is not preserved by the reprojection.
Only the GeoTiff (.tif) and HFA (.img) formats support Use Compression; it is ignored for other formats.
Unlike most functors, this functor cannot be connected directly to a map produced by another functor while it is still in memory — that map must first be saved to disk with Save Map — because the underlying GDAL utility can only operate on maps already written to a file. Re-arranging an in-memory map into the form GDAL's API expects would heavily impact execution performance and the amount of memory required, which is why this restriction is not worked around internally.
Internal Name
TransformMap