Ticket #612 (closed enhancement: fixed)
Add IDRISI Raster Format
|Reported by:||warmerdam||Owned by:||warmerdam|
Description (last modified by warmerdam) (diff)
Dear Frank, over the past few months I have using a number of applications using gdal (mostly openev) to visualize my raster data. For compatibility reasons I mostly use the IDRISI raster data format, which is a flat binary format with an ascii documentation file. In order to be able to use gdal-based applications I used a simple script that created PCI .aux documentation files before passing the raster to the application. It would be really good to have direct IDRISI support in GDAL, though! I looked at the driver implementation tutorial and also browsed the .aux cpp file - but having never dealt with c++ before I couldn't really find the lines to amend. Would it be possible for you to implement the IDRISI raster format in GDAL? I am sure it is a very easy thing to do for someone with some knowledge of c++. The format works as follows: 1.) For each image there is a .rst (.RST) flat binary raster file either in byte (8bit), integer (16bit) or real (32bit) 2.) For each rst there is an .rdc (.RDC) file containing the reference info for the former. A sample: *********** file format : IDRISI Raster A.1 file title : anything really data type : real file type : binary columns : 926 rows : 334 ref. system : plane ref. units : m unit dist. : 1.0000000 min. X : 1584.0000000 max. X : 2509.0000000 min. Y : 240.0000000 max. Y : 573.0000000 pos`n error : unknown resolution : unknown min. value : 0.00 max. value : 30.00 display min : 0.00 display max : 30.00 value units : unspecified value error : unknown flag value : none flag def`n : none legend cats : 0 ************* The first line is constant (file format : IDRISI Raster A.1). The spacing up to the colon is important (start in the first column, colon always in the same place), after the colon it doesn't matter (see "min. X" for example), although there usually is just one blank in between the colon and the value. Since IDRISI is a windows application, there is a CRLF at the end of each line (relevant for writing only). The 'data type' field can have the values 'byte' (8 bit), 'integer' (16bit) and 'real' (32 bit). Everything else should be self-explanatory. I would really be very happy about an implementation of this format! Thanks very much and kind regards, Jan
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