Processing FIL Norway imagery: Difference between revisions

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  python -m pip install c:\path\filnorway_processor-1.0.6-py3-none-any.whl
  python -m pip install c:\path\filnorway_processor-1.0.6-py3-none-any.whl


== Arguments ==  
== Arguments ==
Raster specific arguments:
{| class="wikitable"
{| class="wikitable"
! style="width: 200px" | Argument
! style="width: 200px" | Argument
!Description
!Description
|-
|-
|<code>-f, --format</code>
|<code>--input</code>
|Output format. Should be <code>gpkg</code> or <code>mbtiles</code>. Default is <code>gpkg</code>
|Input directory containing all FIL Norway ECW files
|-
|-
| <code>-nd, --nodata</code>
| <code>--fylker</code>
|Pixel value to make transparent in the completed GeoPackage. Example: <code>0 0 0</code>
|Vector dataset with one layer per Norwegian county. Does not have to contain all counties.
|-
|-
|<code>-tf, --tile_format</code>
|<code>--fotodato</code>
|Image format for saving tiles. Should be one of <code>AUTO, JPEG, PNG, PNG8, WEBP</code>
|"Fotodato" dataset with photography dates and coverage included in the delivery. Should be a single file/layer. This is used to clip datasets to valid data areas.
|-
|-
|<code>-q, --quality</code>
|<code>--outpath</code>
|Quality setting for compressed tiles (JPEG and WEBP). Should be in the range <code>1-100</code>
|Output directory.
|-
|-
| <code>-scl, --scalefactor</code>
| <code>-q, --quality</code>
|Factor to use when it is neccessary to scale down to 8 bit. The range of values to use from each source band is calculated as (mean ± stddev × scalefactor).
|WEBP quality on the output GeoPackages. Default value: 5
|-
|-
|<code>--defrag</code>
|<code>-p, --num_processes</code>
|Increase the page size of the base GeoPackage to avoid fragmentation issues when the file grows very large (several hundred gigabytes). When processing is done, the page size will be changed back to default and VACUUM is run to apply the change and to compact the database.
|Maximum number of parallel processes to use
|-
|<code>--debug</code>
|Enable more detailed log messages
|}
|}

Revision as of 13:04, 7 May 2025

The biannual delivery of the FIL Norway ECW imagery dataset can be efficiently processed and converted to GeoPackage using the Python package filnorway_processor. This package will split the input according to a custom grid with 32768 x 32768 meters cells. The output is stored as GeoPackages with WEBP compression, and organized by county.

Dependencies

  • GDAL >= 3.8.0 (with ECW driver)

The easiest way to get a Python environment where these dependencies are met, is to install the latest version of QGIS . Included is the OSGeo4W shell, where you can install and use the package.

Installation

The package is distributed as a Python wheel-file. Install using pip: 

python -m pip install c:\path\filnorway_processor-1.0.6-py3-none-any.whl

Arguments

Argument Description
--input Input directory containing all FIL Norway ECW files
--fylker Vector dataset with one layer per Norwegian county. Does not have to contain all counties.
--fotodato "Fotodato" dataset with photography dates and coverage included in the delivery. Should be a single file/layer. This is used to clip datasets to valid data areas.
--outpath Output directory.
-q, --quality WEBP quality on the output GeoPackages. Default value: 5
-p, --num_processes Maximum number of parallel processes to use
--debug Enable more detailed log messages
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