The compression tag has no wiki summary.
6
votes
2answers
169 views
How can I reduce the size of my file geodatadase?
We're using file geodatabase for tax mapping. we save building photos and there are 6000 buildings. The size of this data 2GB. So loading the data takes a lot of time we are not unable to do work ...
4
votes
2answers
144 views
Wavelet vs Discrete compression for imagery
What is the main reasons to choose wavelet (jp2, sid, ecw) instead of discrete (JPEG) compression methods for raster data?
Lets limit this question to aerial imagery and lossy compression.
Why ...
4
votes
1answer
294 views
Using PNG/JPEG Compression in GeoServer
Is there any use in setting the PNG and JPEG compression in GeoServer (Services - WMS - PNG Options/JPEG Options)?
The default is 25, but we heard rumours that having compression resulted in a time ...
2
votes
0answers
69 views
Classify trajectory compression algorithm
I'm tryng to classify each compression algorithm based upon their features, i've thinked:
Compression algorithm
Lossless algorithm
Batched algorithm
Rinex
Lossy algorithm
Batched algorithm
...
1
vote
2answers
371 views
Open MapGuide MrSID rasters with FDO GDAL. invalid extent. Not drawing
When I try and save the resource I get: Spatial context extent appears to be invalid (or Default).
The XML:
<?xml version="1.0"?>
OSGeo.Gdal.3.4
Default
This coordinate system ...
0
votes
1answer
334 views
Create moving map application from topographic maps
I'm trying to create a moving map application for an embedded ATOM device. Data source is a 400MB tif file (500dpi) plus projection and worldfile. My naive approach was to load that tiff into Global ...
14
votes
6answers
3k views
Should GDAL be set to produce GeoTIFF files with compression? Which algorithm should be used?
I have a folder of GIS data that consists mainly of GeoTIFF files. The whole set weighs in at about 1.2 GB. I noticed that if I pack the contents into a tarball, it smashes down to about 82 MB. I ...
