A series of Earth-observing satellite missions jointly managed by NASA and the U.S. Geological Survey.

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48 views

Georeferencing an aerial image based on satellite imagery

As part of a bigger project I need to georeference an aerial image based on a landsat image downloaded form usgs. I use qgis. can I somehow place the layers on top of each other and mark certain ...
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70 views

Which Landsat version is appropriate to imply a supervised classification with GRASS GIS?

I need to imply a supervised classification with GRASS GIS to find build-up areas. I want to avoid Landsat 7 images due to SLC problem. Can I use images of Landsat 8 or it's better to use images ...
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4answers
311 views

Fix Landsat 7 SLC-off in ENVI?

I have a couple of Landsat 7 images and they all have striping as a result of the SLC failure. Does anyone have any suggestions as to how to destripe the image using ENVI? I plan to use these images ...
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127 views

Is Terrain and Topographic Correction the same for Landsat8?

Landsat 8 L1 products are "Terrain Corrected", that said it means that are they already "topographically corrected", like both words are synonyms or you need to apply correction techniques as well? ...
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2answers
36 views

Matching Landsat 8 with previous Landsat images

I am working with Landsat 8 in ENVI. My image's dimension is 8921 x 13131. I need to apply forest mask to this image which dimension is 8805 x 12321. I try to resize an image, but it doesn't work. ...
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49 views

Programmatically Downloading Landsat Images

There was a very similar question to this one here , but it specified Landsat 8 images; I'd just like to be able to download ANY landsat images, given latitude and longitudes as inputs. Just wanted ...
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68 views

Trouble with opening/using i.atcorr in GRASS

I'm relatively new to GRASS. I'm running version 6.4.3 on a Windows 7 machine. I'm trying to process Landsat 5 imagery from multiple states, so I was hoping to approximately follow the workflow here: ...
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0answers
54 views

GRASS i.atcorr outputs unusual values

I have problems using the atmospheric correction module i.atcorr in GRASS 6.4.3RC3. I try to correct two Landsat ETM+ scenes, but the output for bands 4 and 7 has values that seem to be incorrect. ...
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87 views

How to export a map (satellite image, 3 bands) to Tiff without losing the resolution in Qgis.

I manually improve the colour contrast of landsat images. The printing in pdf afterwards is OK, as it maintains the resolution due to the high dpi. Now I am interested to obtain a kmz/kml file of the ...
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106 views

Change Detection ArcGIS with multiple dates

I'll explain my aim first: I am trying to create a single raster to represent vegetation resilience, I am doing this via change detection. So far I have created 5 Change detection images, where 2000 ...
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83 views

Saving/exporting a RGB Landsat 8 into a tiff for posterior import into AutoCad

I am familiar with making maps QGis. Generally, I use the print composer and save the RGB satelite image in pdf. However, a client is asking me for a georeferenced tiff to load into autocad. I would ...
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106 views

GRASS i.landsat.toar returns empty raster

I am trying to use the GRASS module i.landsat.toar. Currently the files created are empty and it spits out: So it seems that it is not picking up something? The location is set to the extent of ...
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2answers
95 views

Soil water holding capacity from Landsat data

I have an idea to get information about soil water holding capacity using Landsat data. Is it possible to use Landsat data and ArcMap or other related software do this? I want to know the method to ...