Rasters are regular grids of values, usually stored in an image-like format.
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1answer
22 views
Raster Tile Merge Performance of PostGIS 2.0
I'm attempting to intersect Australian Census boundary polygons with the 1" SRTM DEM (10.5bn points across Australia), and output the result as a single raster image on the fly.
The DEM is stored in ...
4
votes
2answers
57 views
How to efficiently read and reclassify many rasters in R
I've been tasked to create a suitability analysis of wave conditions in the Gulf of Mexico. I have 2 thousand or so raster files that are about 8 MB each (2438 columns, 1749 rows, 1km cell size). ...
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votes
0answers
29 views
Problem in importing raster data from PostGIS to Geoserver
I am using Opengeo Suite 3.0.2, PostGIS 2.0.3 and PostgreSQl 9.2.
I am trying to import raster data from PostGIS to Geoserver but facing an error.
I follow this tutorial link to import the raster ...
0
votes
1answer
17 views
How do I combine many ECW files in MapInfo?
I have MapInfo 11.5.0.16 (I don't have ArcGIS) and I am trying to combine (in some sense) a large collection of ECW files.
I can load one ECW at a time in MapInfo but I have very many. MapInfo ...
2
votes
1answer
63 views
How to calculate volume from a raster file?
I have a raster file containing the depth of water. I need to find the volume of water using that raster file. I need to find the area of each cell and multiply with the depth. How can I do it in ...
3
votes
2answers
52 views
How to calculate the shared area between a raster and a shape file in ArcGIS 10?
I have a raster file with 5 classifications developed from habitat modelling algorithms. I'd like to know how much of 2 classes of the raster is covered by the network of protected areas (Shape file). ...
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0answers
32 views
Feature to Raster Conversion Results in Empty Raster [closed]
I have a simple shapefile with one feature in it with a single value (of 1). I am trying to run a Euclidean Distance on that feature, but I get "invalid parameters" errors.
So I tried to convert the ...
0
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2answers
58 views
How to delete isolated pixels in ArcGIS 10.1?
I want to know that it is possible or not to edit the raster pixel in ArcGIS.
I want to delete isolated pixel and I want to delete some pixel by manually.
please tell me how can i do it manually or ...
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0answers
17 views
Can I apply the Euclidean Distance tool for a single point feature class? [duplicate]
So, as suggested in my previous question, I tried to perform perform the Euclidean Distance tool for a single point feature class. For som e reason it doesn't work and the error given is ERROR010092: ...
2
votes
1answer
41 views
Create raster distance around a single point feature class
Okay, so I'm relatively new to ArcMap and I'm trying to use the Fuzzy membership for suitability test. I have a single point feature class that I wanna use for this analysis. I know that in order to ...
1
vote
1answer
43 views
No. of Bands in the input Raster
I have downloaded a 7.5 min DEM . Now while I am trying to mosaic them it gives me an error saying "Input and target dataset should have the same number of bands" . How can I figure out the number of ...
2
votes
2answers
40 views
Raster format to read with python
I currently have a DEM raster stored in an ESRI geodatabase. I've been asked to create a purely python (e.g., no arcpy functions) program that works with the values. Therefore, I need to convert the ...
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vote
0answers
49 views
QGIS: Different projection result for on the fly and transformation
I am a bit confused about the result of a re-projection/transformation of a raster in QGIS 1.8 (Lisboa).
WGS84 to WGS84/UTM34N. When I use the 'on the fly' transformation the resulting raster has a ...
0
votes
1answer
26 views
Maintain 8-bit pixel depth in Raster Calculator
Would anyone know how to maintain 8-bit pixels when computing raster calculations in ArcMap?
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vote
2answers
40 views
Calc vs. Overlay for speeding up band math in R 'raster' package?
Regarding yesterday's question about how to speed up band math in the R 'raster' package, would it be the same to use overlay to calculate NDVI instead of calc? If that's not the case, what's the ...
