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Raster is a data format consisting of regular grids of values, usually stored in an image-like format.

2 votes

Loading multiple raster files from list into ArcGIS Desktop?

I have created a script for this - it selects all rasters in a given set of folders (and subfolders) by using an polygon AOI. It works fine but seems to have one issue when there are over 150 files in …
GeorgeC's user avatar
  • 8,298
0 votes

How to find the area of raster values within polygon zones?

For a raster I used the following. … arcpy.GetRasterProperties_management(outRaster, "CELLSIZEY"))))\ *string.atof((str(arcpy.GetRasterProperties_management(outRaster, "CELLSIZEX"))))) --- this gives the area of the raster
GeorgeC's user avatar
  • 8,298
1 vote
Accepted

Limits to processing files from a list of rasters

Figured out that it was an issue with projections. It's all fine now. Give me a shout if anyone would like the code.
GeorgeC's user avatar
  • 8,298
2 votes
1 answer
484 views

Limits to processing files from a list of rasters

I have written a script which selects all files that are within or subset by an area of interest polygon. This works fine but when the file list it's working has more than 150 records it stops compari …
GeorgeC's user avatar
  • 8,298
1 vote
2 answers
650 views

mapbasic convert raster to mrr

I'd like to convert a whole folder of files from GRD to MRR. Is this possible in mapbasic or from the interface or do I need to do them file by file? I have tried to searching in the mapbasic forums …
GeorgeC's user avatar
  • 8,298
2 votes
1 answer
4k views

Issue with Mosaic to New Raster tool

I am having a major issue with the Mosaic to New Raster tool when importing ASC files. It processes the first few files but not all of them. … to Polygon (2.1.1) print "Raster to Polygon...Aspect" asp__v = "P:\\2011\\Job_106_TRC_FireHazard_Mapping\\Output\\Mosaic_FINAL_deliverable\\LIDAR\\ATWM\\atwm.gdb\\asp_"+RN+"_v" …
GeorgeC's user avatar
  • 8,298
1 vote
Accepted

Change select color in a raster in QGIS using Serval or Value tool

It fills the values in based on what you change in the raster. In the python code add in the name of the raster layer that needs to be edited. …
GeorgeC's user avatar
  • 8,298
1 vote
1 answer
82 views

Change select color in a raster in QGIS using Serval or Value tool

Is it possible to edit the table view of a raster that you see in the Value tool? … I have considered approaches like GDalCalc but they seem to save a new raster each time. I need to review and change multiple areas in the same file. …
GeorgeC's user avatar
  • 8,298
4 votes
1 answer
3k views

Getting a constant background color for transparency

Would a raster calculator operation be able to clean this up? or can I fix it in the generation of the tif (ideally)? …
GeorgeC's user avatar
  • 8,298
3 votes
2 answers
5k views

Get extent of Georeferenced Rasters in Python and output to polygon shapefile

Is it possible to capture the extent of a raster using Python? … Anyway this will be a polygon of the whole raster file and not just the extents -even if this is generated, I guess we could then run a merge/dissolve but the files created are to big. …
GeorgeC's user avatar
  • 8,298