Questions tagged [water]
The water tag has no usage guidance.
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Which function/method in GEE is similar to “supervised classification of shapes tool in SAGA GIS”?
For object based image analysis (OBIA), I have segmented my image. In next stage, I want to assign classes to segments (training data) followed by supervised classification of attributes data. In SAGA ...
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13 views
Making GEE code for Pansharpening Sentinel-2
The following link contain information about Pansharpening Sentinel-2
https://leclab.wixsite.com/spatial/post/pansharpening-sentinel-2-imagery-in-google-earth-engine
The code in picture form and long ....
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1answer
130 views
GEE – Smoothing curve of detected water area
I am trying to plot the time series chart of the detected water area by otsu's method in Sentinel-1 images as a smoothed average curve.
I found two approaches to this for the Google Earth Engine:
...
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1answer
29 views
Techniques to map small water bodies in desert
Techniques to map small water bodies in desert
I have task to map water bodies in a desert. I used landsat 8 and calculated three indices called NDMI, Tasseled Cap Wetness, & AWEIsh. I am ...
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32 views
select waters pixels in GEE as magic wand tool
I am interested to map small water bodies in a desert . I used Gond method described in an article entitled "An Assessment of Surface Water Detection Methods for Water Resource Management in the ...
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1answer
56 views
mapping of small water bodies in desert
I am trying to map small surface water bodies in a desert. The code and methodology attached. My issue is , water pixels don't cover full extent water bodies (screen shot attached) . ? What ...
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35 views
Map surface water bodies in a desert
I am interested in mapping surface water bodies in a desert. I have used Tasseled Cap Wetness (TCW) in GEE. After running my code, I found that water bodies (locally called tobas) were not marked. I ...
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41 views
Checking if network has connection errors
I have given a network of a city in dwg.
I made a dxf that only contains the network itself, and created a layer for every type of pipe (like 25KPE, 80KPE etc...).
How do I check if the network is ...
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48 views
ArcGIS Pro Arcade expression to Maintain line-to-point connectivity
A customer was using a geometric network to maintain connectivity between lines and points. Now they are using ArcGIS Pro, which does not support geometric networks.
They cannot use the Utility ...
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1answer
250 views
Calculating water occurrence of Sentinel-1 images in Google Earth Engine
I would like to derive the occurrence of surface water bodies from Sentinel-1 image collection in the Google Earth Engine.In my example I could already compute the water mask using Otsu’s method for ...
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17 views
Scale national economic data down to a watershed
Economic Input Output databases such as e.g. the World Input-Output Database by the European Commission contain economic (and often environmental) statistics. The spatial resolution of data provided ...
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31 views
Creating a “Stream Order” of canal system using ArcMap
I'm interested in creating a "Stream Order" for our canal system. I am the GIS Specialist for an irrigation district. I would like to have the ability to have a layer for when I click on a section of ...
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124 views
SVG symbols for water management
I'm searching for SVG of different (german) hydrant types ("Unterflurhydrant", "Überflurhydrant", "Hydrantenschacht") etc.
The symbols are currently stored as polygons in MapInfo's proprietary .TAB (...
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1answer
188 views
Extract data from osm.pbf with GDAL
I tried osmosis, osm2pgsql, osmfilter, and probably most of OSM related tools in order to extract polygon rivers and water bodies.
Among the tools, OGR is intuitive and returns good results so far
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