GeoTIFF: Unterschied zwischen den Versionen
Aus Geoinformation HSR
Das-g (Diskussion | Beiträge) K (make each HowTo/Tip a subsection) |
Das-g (Diskussion | Beiträge) (add new Tipp →"cloud optimized" GeoTIFF) |
||
| Zeile 14: | Zeile 14: | ||
% gdal_translate -of VRT your.tif work.vrt | % gdal_translate -of VRT your.tif work.vrt | ||
% gdal_translate work.vrt fixed_your.tif | % gdal_translate work.vrt fixed_your.tif | ||
| + | |||
| + | === "cloud optimized" GeoTIFF === | ||
| + | |||
| + | ==== General information ==== | ||
| + | * cogeo.org | ||
| + | * https://trac.osgeo.org/gdal/wiki/CloudOptimizedGeoTIFF | ||
| + | * [https://fosdem.org/2018/schedule/event/geo_gdal/ FOSDEM'18 talk "GDAL Tips and Tricks - GDAL installation, Python usage, and Cloud GeoTIFFs"] by Jeremy Mayeres, 00:09:10 to 00:13:18 | ||
| + | |||
| + | ==== creation: GeoTIFF to "cloud optimized GeoTIFF ==== | ||
| + | |||
| + | (According to above talk, 00:11:14) | ||
| + | |||
| + | Create internal overviews (if not already created) | ||
| + | |||
| + | gdaladdo -r average in.tif 2 4 8 16 | ||
| + | |||
| + | Then | ||
| + | |||
| + | gdal_translate in.tif out.tif \ | ||
| + | -co TILED=YES \ | ||
| + | -co COPY_SRC_OVERVIEWS=YES \ | ||
| + | -co COMPRESS=LZW | ||
| + | |||
| + | Host result on server supporting HTTP 1.1 Range Requests (Byte Serving). (Amazon S3, Google Cloud Storage, Azure all support this.) | ||
| + | |||
| + | http://www.cogeo.org/developers-guide.html uses <code>-co COMPRESS=DEFLATE</code> instead of <code>-co COMPRESS=LZW</code>. According to https://trac.osgeo.org/gdal/wiki/CloudOptimizedGeoTIFF#Unspecifiedpoints, either can be used. | ||
Version vom 6. Februar 2018, 13:03 Uhr
See also:
- GDAL - Translator
Inhaltsverzeichnis
Tipps
How to convert Tiff to GeoTIFF
See GDAL.
How to remove the nodata values from a GeoTIFF?
I find many instructions on how to add the values, but none on how to remove them. => There isn't a direct way of accomplishing this. You could extract a work.vrt file, then manually edit it and remove the line(s) with the NoDataValue tags. Then convert back to geotiff:
% gdal_translate -of VRT your.tif work.vrt % gdal_translate work.vrt fixed_your.tif
"cloud optimized" GeoTIFF
General information
- cogeo.org
- https://trac.osgeo.org/gdal/wiki/CloudOptimizedGeoTIFF
- FOSDEM'18 talk "GDAL Tips and Tricks - GDAL installation, Python usage, and Cloud GeoTIFFs" by Jeremy Mayeres, 00:09:10 to 00:13:18
creation: GeoTIFF to "cloud optimized GeoTIFF
(According to above talk, 00:11:14)
Create internal overviews (if not already created)
gdaladdo -r average in.tif 2 4 8 16
Then
gdal_translate in.tif out.tif \ -co TILED=YES \ -co COPY_SRC_OVERVIEWS=YES \ -co COMPRESS=LZW
Host result on server supporting HTTP 1.1 Range Requests (Byte Serving). (Amazon S3, Google Cloud Storage, Azure all support this.)
http://www.cogeo.org/developers-guide.html uses -co COMPRESS=DEFLATE instead of -co COMPRESS=LZW. According to https://trac.osgeo.org/gdal/wiki/CloudOptimizedGeoTIFF#Unspecifiedpoints, either can be used.
