Changes between Version 1 and Version 2 of FAQRaster

Timestamp:

Apr 22, 2007, 10:46:41 AM (17 years ago)

Author:

Mateusz Łoskot

Comment:

Fixed headings

FAQRaster

@@ -3 +3 @@
 [[PageOutline(2,,inline)]]
 
-== Raster Support ==
-
-=== Why won't gdalwarp or gdal_merge write to most formats? ===
+== Why won't gdalwarp or gdal_merge write to most formats? ==
 
 GDAL supports many raster formats for reading, but significantly less formats for writing. Of the ones supported for writing most are only supported in create copy mode. Essentially this means they have to be written sequentially from a provided input copy of the image to be written. Programs like gdal_merge.py or gdalwarp that write chunks of imagery non-sequentially cannot easily write to these sequential write formats. Generally speaking formats that are compressed, such as PNG, JPEG and GIF are sequential write. Also some formats require information such as the coordinate system and color table to be known at creation time and so these are also sequential write formats.
@@ -13 +11 @@
 To determine which formats support which capabilities, use the ''--formats'' switch with pretty much any GDAL utility. Each driver will include either '''r''' (read-only), '''rw''' (read or sequential write) or '''rw+''' (read, sequential write or random write).
 
-=== How to convert a raster to a layer of polygons? ===
+== How to convert a raster to a layer of polygons? ==
 
 ''TBD''