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Theoretical help needed
By maximl,
Hello all,
Being a student in GIS, I have yet a lot to learn. I actually have to give in a report for my class, but there are two things I would like to do, that I am stuck on.
I am working on IDRISI Taïga. I have decided to map the natural risks of a town situated in a valley in order to find the places where the town can expand. I have now a map with the existing urbanized areas, the flood zones (where it is forbidden to build), the avalanche zones, the slopes under x% (from a D
Euclidian distance error ArcGis 10
By mikeostiarm,
I have a problem with ArcGis 10. When I try to calculate the EUCLIDIAN DISTANCE from ArcToolbox works perfectly smooth. When I try to make a model, using model builder, and I add an EUCLIDIAN DISTANCE to tool, and I try to run it, i get this error:
Start Time: Tue Apr 12 22:50:10 2011
ERROR 999999: Error executing function.
Failed to open raster dataset
Failed to execute (Euclidean Distance).
Failed at Tue Apr 12 22:50:12 2011 (Elapsed Time: 2.00 seconds)
As I said, the data is the s
Learning ArcSDE and ArcGIS Server (Basics)
By skylmla,
Dear All,
Does anyone get any documents that I could you to learn ArcSDE and ArcGIS Server for beginners. Things like setup, configuration, etc....
Please kindly help me as I am in need to use it very soon for my project.
Thanks in advance for kind help.
Regards,
How to remove google earth copyright texts on the images
By skylmla,
Hi all,
Does anyone know how to remove the copyright texts (like DigitalGlobe...) in Google Earth's images v5 or v6? I know there is tool to use for this task in Google Earth v4.2.
Please help me if you could...
Thanks in advance...
Convert Raster into USGS DEM
By Lurker,
hello, any clue on this ?
I have raster data which is ESRI BIL, and I need to cenvert to USGS DEM, which have .dem extension
any tool or maybe script to do this ?
regards, MOD
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Hello folks! I am trying to use the Lyzenga Algorithm for estimating the depth of water in shallower areas, probably depths under 8-10 meters of lakes. First of all, how accurate is this algorithm in practice? Secondly, lets say i have the band values. can someone explain me how to retrieve those depths? I am following the "Lyzenga Algorithm for Shallow Water Mapping Using Multispectral Sentinel-2 Imageries in Gili Noko Waters" paper, but there are 3 steps of getting NDWIs, NDCIs and after filtering the Sun Glint Correction, then it finally comes to the depth calculating. it end ups in a formula of following: 𝑧 = 28.32 ∗ 𝑋1 − 36.25 ∗ 𝑋2 + 9.42 ∗ 𝑋3 + 16.35 x1 , x2, x3 are RGB values respectively. What do you guys think? can i just apply this formula ? if not, what is the purpose of all the previous steps, and will they change the rgb values anyways? -
Hello folks! I am trying to use the Lyzenga Algorithm for estimating the depth of water in shallower areas, probably depths under 8-10 meters of lakes. First of all, how accurate is this algorithm in practice? Secondly, lets say i have the band values. can someone explain me how to retrieve those depths? I am following the "Lyzenga Algorithm for Shallow Water Mapping Using Multispectral Sentinel-2 Imageries in Gili Noko Waters" paper, but there are 3 steps of getting NDWIs, NDCIs and after filtering the Sun Glint Correction, then it finally comes to the depth calculating. it end ups in a formula of following: 𝑧 = 28.32 ∗ 𝑋1 − 36.25 ∗ 𝑋2 + 9.42 ∗ 𝑋3 + 16.35 x1 , x2, x3 are RGB values respectively. What do you guys think? can i just apply this formula ? if not, what is the purpose of all the previous steps, and will they change the rgb values anyways?
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