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network profile
| bio | website | |
|---|---|---|
| location | London, United Kingdom | |
| age | 25 | |
| visits | member for | 6 months |
| seen | May 13 at 22:26 | |
| stats | profile views | 4 |
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Apr 5 |
comment |
Handling MODIS NoData cells with gdalwarp Thanks for this - the problem you describe is exactly what has been concerning me. As I mention above, I've come up with a reasonable work-around for the particular data I'm using, but using dstalpha is something I wasn't aware of and will certainly look at further. |
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Apr 5 |
accepted | Handling MODIS NoData cells with gdalwarp |
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Apr 5 |
comment |
Handling MODIS NoData cells with gdalwarp Thanks for this. I've gone ahead and used gdalwarp as I needed to reproject at the same time, but specified srcnodata and dstnodata in the command. What was confusing me was the very specific case where the MODIS product doesn't have a fill value (e.g. MOD09A2 QC layers), however, I've worked around this in Grass. |
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Apr 3 |
awarded | Commentator |
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Apr 3 |
comment |
Handling MODIS NoData cells with gdalwarp Yes, gdal_translate would work too, but what I'm really interested in is how to ensure I don't lose information when setting the NoData value... |
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Apr 3 |
comment |
Handling MODIS NoData cells with gdalwarp Yes - I couldn't see a satisfactory explanation |
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Apr 3 |
asked | Handling MODIS NoData cells with gdalwarp |
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Mar 15 |
awarded | Teacher |
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Mar 15 |
comment |
r.neighbors produces no output Answer written up. There's no obvious way to know this, but with Grass its essential to pay close attention to the region settings. Before running commands, type g.region -p in the command line to make sure the settings are as you expect. |
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Mar 15 |
answered | r.neighbors produces no output |
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Mar 15 |
comment |
r.neighbors produces no output Have you set the region to match your input raster? i.e. g.region rast=bf03pits |
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Feb 26 |
comment |
How to perform unsupervised classification of LANDSAT time series using Grass? Good advice @Nikos - I'm going to write a script using the R package 'landsat' to carry out PIF identification for relative normalisation of the tiles. I'll update this post when I have a result. |
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Nov 22 |
comment |
How to perform unsupervised classification of LANDSAT time series using Grass? Thanks @whuber. This sounds like a good idea, however, the area I'm looking at consists of 11 LANDSAT tiles mosaicked together. Disolacing these and mosaicking them together will produce a massive file and take a long time. Instead, could I make an image group of all the points in the time series and generate a signature for this? |
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Nov 22 |
awarded | Custodian |
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Nov 22 |
awarded | Editor |
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Nov 22 |
reviewed | Edit suggested edit on How to perform unsupervised classification of LANDSAT time series using Grass? |
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Nov 22 |
revised |
How to perform unsupervised classification of LANDSAT time series using Grass? Improved formatting |
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Nov 21 |
asked | How to perform unsupervised classification of LANDSAT time series using Grass? |
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Nov 18 |
comment |
i.maxlik cannot read i.class output signature file Yes - checked and double checked. If the file name is entered wrongly the error is 'Unable to open signature file <wrong filename>, so there seems to be something wrong with the file itself. |
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Nov 18 |
asked | i.maxlik cannot read i.class output signature file |
