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SPOT 7 was launched !
By Arhanghelul,
Another great news for the remote sensing community: SPOT 7 was launched from India and is now on orbit !
http://www.spacenews.com/article/launch-report/41070india%E2%80%99s-pslv-rocket-lofts-airbus-spot-7-satellite
This will be a great source of satellite images (but not for free )
Split Window Algorithm to calculate LST
By pranjal004,
Hello friends
I am having a problem. How do we calculate the Atmospheric water vapour content? I found some algo in paper by "Estimation of the Total Atmospheric Water Vapor Content and Land Surface Temperature Based on AATSR Thermal Data Tangtang Zhang 1, Jun Wen 1,*, Rogier van der Velde 2, Xianhong Meng 1, Zhenchao Li 1, Yuanyong Liu 1 and Rong Liu 1"
Please help asap
convert *.tpk file into something more useful
By hklix,
Hi!
I have several *.tpk ArcGIS offline tile cache packages. The largest is 550MB.
I want to use the raster data of the bottom (highest pixel) zoom level in other software, particularly QuoVadis.
I also have access to ArcMap (which I have never used before). Exporting smaller tpk files into TIFF with worldfile does work nicely, but the larger files show 1000 TB uncompressed size and any export attempt from ArcMap ends in an error immediately.
The 500MB tpk file is very efficient, th
Emissivity calculation from Sobrino's method
By pranjal004,
Hey everyone,
While calculation emissivity from NDVI index using Sobrino's method, it is clear what we have to do when NDVI is greater than 0.2. But when NDVI is less than 0.2, we are given an equation a + b®. where a and b are regression coefficients and R is the reflectivity. R can be calculated easily. How do we estimate or select the values of a and b? My project area also has water body which has a negative NDVI value. Please help!
How to count the number of intersections in line features
By roycastanares,
Hi everyone,
Can someone help me with counting the number of intersections in the line features I have digitize.
When digitizing, I made it sure that I have nodes or vertex in intersection then I snap on those when digitizing the intersecting line. But now my problem is extracting just the intersection, not the vertices.
I know there should be an easy way but right now, what I have in mind is this:
1.Convert line to points,
2.Then check the x and y position of points,
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