Questions tagged [water]

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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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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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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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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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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 ...