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2
votes
1answer
62 views

Gdal/QGIS resampling asc file

I have a DEM (.asc) file with a resolution of 1000 meters per pixel. Therefore the file has a lot of columns and rows. I would like to chance the resolution per pixel from 1000 to 3000 meters per ...
1
vote
1answer
17 views

The resampled image has many NaN values and does not cover the complete area of the input raster

when I resample an image of 20m to 240m resolution, the resampled image does not cover the whole area of the input image and does the resampling for some pixels in which I get many NaN values. How can ...
1
vote
1answer
45 views

Better way to combine 2 rasters

I have two raster layers: One with 56 m resolution and the other has 30 m resolution. Usually, I just use the 'Combine' command in ArcGIS to combine them, getting a single value for each unique ...
2
votes
0answers
46 views

Is it feasible to reclassify a raster which has been resampled/smoothed for display purposes?

Background: I have a Google Earth KMZ file which shows ground movements after an earthquake, arranged into discrete classes: From the KMZ file I'm able to download the original PNG images, which ...
1
vote
2answers
94 views

How to resample polygon vertices so that they are evenly spaced in Arc 10

I have digitized the outline of many river channels (by both manually picking points and using streaming mode), but now I need the vertices to be evenly spaced (for input to another program). I tried ...
3
votes
2answers
599 views

Resample, ArcGIS: How do I avoid resample taking into acount NoData values?

I am trying to Resample a raster dataset to match the resolution of another dataset. I have fine resolution data on small islands (surrounded by NoData in the sea). When I re-sample the data to a ...
3
votes
1answer
334 views

Vector to Raster for Smoothing purposes

I have a vector file that represents transit scores by CT of a city. It shows harsh boundaries where one CT has great access to transit and right beside that CT is one that has extremely poor access. ...
4
votes
1answer
89 views

What proportion of the 240m area sensed by MODIS must be forest before it is defined as forest?

MOD12 is a MODIS product at 240m resolution. Landsat produces 30m resolution products, which I resampled to 240m resulting in a raster of proportion forest cover in each 240m pixel (based on the mean ...
3
votes
1answer
190 views

how to square the pixels of a GeoTiff

I have a GeoTiff that has been supplied to me with non square pixels (I suspect due to reprojection to lat lon at some point). However the next step in my processing chain requires a Arc ASCII grid as ...