If the user explicitly requests compression it will be up to them to ensure the file isn’t too large. As a library, it presents a single abstract data model to the calling application for all supported formats. Maybe after each block is written, or on file close, panBlockStart and panBlockSize must be updated and the file structure re written. Many of the raster and vector formats supported for reading can be also be generated. The decision to use a spill file or not is flawed – we don’t know how big the file is before we write it.
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Whatever the results are, I think only Frank will be in position to confirm if this is a bug in GDAL or in the other viewers. Retrieved from ” https: It may be necessary to indicate the the format to create, various creation options affecting how it will be created and perhaps a coordinate system to be assigned. Of haf things that were ommitted from the first patch I have fixed the first 2 – ie Imagine now recognises that the files is compressed and reads in a range of data types OK.
Creating New Files Access an existing file to read it is generally quite simple. It has been tested against Imagine generated files and does the same things in all cases I could think of. Changed 14 years ago by warmerdam. When dumping the 1. Hffa page was last edited on 24 Decemberat Oldest first Newest first Threaded. A ‘s’ is appended for formats supporting subdatasets.
In Memory Raster . If we do this, we would need to modify SetRasterBlock to work hfs in this case even for uncompressed files I would hope. Show comments Show property changes. I believe the problem is caused by me, possibly during my esri merge.
Projections and transformations are supported by the PROJ. The others were generated with GDAL 1. Even writes; I’ve reviewed quickly my changesets in HFA code between 1.
GDAL Raster Formats
The format should be the short name reported in the –formats list, such as GTiff. Could you please ensure that this is not a duplicate of ticket ?
I also added documentation on the driver for the creation options see with gdalinfo –format hfa and moved hfacompress. Powered by Trac 1.
HFA — Erdas Imagine .img
Opened 9 years ago Closed 9 years ago Last modified 9 years ago. Description last modified by warmerdam I use below command to export gddal data from Georaster,but the major GIS software can’t open it, like ArcMap? It looks like an Hga issue:.
My patch does not make use of the fact that data can be encoded as 1, 2, and 4 bits – 8 bits is the minimum size. Articles with short description Articles lacking reliable references from May All articles lacking reliable references Pages using Infobox software with unknown parameters.
A value of OFF will disable all debug messages. Currently reuses the existing block allocation if big enough.
# (HFA Compression) – GDAL
Gda as a guest Name. Last modified 14 years ago. Views Read Edit View history. Powered by Trac 1. Download all attachments as: Show comments Show property changes. Starting with GDAL 2. In answer to some of your questions: