680 reputation
212
bio website
location Malaysia
age
visits member for 1 year, 9 months
seen Apr 15 at 4:31

Jul
30
accepted How to color-balance false-composites of pan-sharpened Landsat images in GRASS?
Jul
30
comment How to color-balance false-composites of pan-sharpened Landsat images in GRASS?
I knew there must be a better way! Now I can freely use the i.sharpen module. Thanks for pointing out the r.rescale module. Awesome work Nikos!
Jul
9
awarded  Yearling
Jan
24
comment How to determine aerosol model value for i.atcorr in GRASS?
Not really. I picked this as answer because it is an easy (and free) way to get data. The problem is I can't use them because they didn't exactly match the time/location of my data-set. I've decided to abandon my search (for now) and opted for the simpler DOS1 method.. Sorry that I can't be much of a help..
Jan
8
awarded  Self-Learner
Dec
11
awarded  Enthusiast
Dec
1
awarded  Nice Question
Nov
30
comment Why Do Colors Look Darker When Printed on Paper?
Well explained! I really like the standard color palette idea. But I'm using GIMP a lot: all of those median/gaussian blur filters will definitely alter any color I originally pre-set.. The ever-changing color-palette makes it a moving-target. Any idea on how to do this?
Nov
30
accepted How to determine aerosol model value for i.atcorr in GRASS?
Nov
30
revised Why Do Colors Look Darker When Printed on Paper?
added 4 characters in body; edited title
Nov
30
accepted Why Do Colors Look Darker When Printed on Paper?
Nov
30
asked Why Do Colors Look Darker When Printed on Paper?
Nov
28
answered How to save a raster and vector into a single PNG file in GRASS?
Nov
28
comment How to determine aerosol model value for i.atcorr in GRASS?
Hey, I was wondering where to get the MODIS AOD data (it's not available on their site).. I'll take a look at this site thoroughly later; so far the data I can see there is in the same form as the TOMS data - Aerosol Index (man, NASA websites sure are complicated to browse through - I got a headache just by looking at it).. Anyway, thank you so much @Tobi :)!
Nov
28
comment How to determine aerosol model value for i.atcorr in GRASS?
This is nice! If only the data isn't so random.. The data is user-submitted, right?
Nov
27
revised How to determine aerosol model value for i.atcorr in GRASS?
deleted 1748 characters in body
Nov
27
comment How to determine aerosol model value for i.atcorr in GRASS?
I see, that's one way to do it.. But I've decided to pursuit this route of atmospheric correction at other time and have opted (for now) the simplified DOS1 method. Thanks for the clarification of the TOMS Earth Probe data: it is indeed an index and unit-less - not quite like the AOD data required by the 6S algorithm.. But I have yet to find free AOD data readily usable for the period of Landsat I'm using (<2004). But with further reading here, the data could still be processed further to develop the model. Maybe.
Nov
27
comment Is there an easy way to taper huge amounts of drainage vectors?
I need to verify something; did I do step #3 right?: (sqrt(proximity))*(exp(distance/-bandwith))
Nov
22
comment Recoloring geotiff for visual presentation
I usually have to preprocess GeoTIFFs with gdal_translate or the other GDAL tools - and preserve the geo-tags with libgeotiff - before passing it to GIMP. I heard Photoshop is better suited than GIMP for this kind of purpose, so I guess that'll be your best bet. If all fails - you can always bite the bullet and use a more full-fledged GIS software like GRASS, QGIS, SAGA, etc.. Wish you all the best ;)
Nov
22
comment Recoloring geotiff for visual presentation
It loads? Can you go on doing what you want while ignoring the error? I haven't seen that kind of error when handling GeoTIFFs in GIMP before (but I have no experience with RapidEye images).. GIMP to my experience is still rough on the edges when it comes to handling GeoTIFFs