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Questions tagged [lakes]

use this tag when asking questions related to lake related topics in GIS

0
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2answers
41 views

Displaying of lake names similar to Google or OSM maps

This is a lake in Netherlands. Right side of the image : Points contains names of the lake (red label). I performed a spatial join between the point and polygon in order that the polygon get names ...
0
votes
0answers
32 views

How can I change the elevation of a lake on a DEM so I show the lake bottom contours?

I'm studying the drainage of a lake and I have a DEM of the lake and the surrounding area. I already identified the shorelines of ancient lake levels at higher elevations, but I would like to keep ...
-1
votes
1answer
136 views

Shapefiles with Ireland's Inland Waterways

I wish to produce a set of polygons for each county on the island of Ireland. I found shapefiles here of all 32 counties: https://www.townlands.ie/page/download/ The problem is that there are no ...
4
votes
1answer
95 views

Do DTMs record depth of lakes?

Is it possible to extract the depth of an inland lake from a DTM or DSM? Is it recorded or just the surface elevation of the water?
0
votes
1answer
61 views

Drone survey in coastal shore areas

Problem : I want to map using a drone the lake's shores and nearby water shallow areas; I used dronedeploy to plan the survey ; I setup the drone to capture at least two pictures overlapping the ...
2
votes
1answer
358 views

Extracting flat areas and saving them as lakes using QGIS?

I would like to extract lakes and sea from a DEM (SRTM) and save them as a separate layer. Is this possible? I have tried to extract flat areas with the Raster Calculator, but that did not work.
1
vote
1answer
28 views

Is there a United States waterbody index number available?

In searching for this, I see that in some countries they have a waterbody index number, a unique ID for each water body. Does such a system exist in the US and is it available online or from any ...
1
vote
0answers
238 views

Muhammad al-Idrisi lake Victoria map 12th Century

Wikipedia and many other sources state along the lines of, "An excellent map, known as the Muhammad al-Idrisi map from the calligrapher (sic) who developed it and dated from the 1160s, clearly depicts ...
16
votes
1answer
2k views

Which interpolation technique is suitable for a bathymetry of a small lake?

This is a lake of approximately 13 ha with 81 sampled depth points in about 10 transect lines: Previously in ARCgis with a 50 ha lake and about a 100 depth sampling points, I got decent output with ...
0
votes
1answer
835 views

Calculating volume using polygon instead of contour line in ArcGIS Desktop?

What I'm attempting to do is calculate the volume of a lake using a polygon I created by classifying an image for water. I then extracted the polygon from the classification process. What I'm left ...
2
votes
1answer
2k views

Seeking outline coordinates of bodies of water (lakes, rivers, ponds) for country? [closed]

I'm in need of acquiring the coordinates of the outlines of all the water bodies inside a country, with the exception of "Sea" or "Ocean" water. Right now, I'm manually outlining the lakes and rivers ...
5
votes
1answer
970 views

Find lakes on an elevation raster

I would like to know if there is a way to identify lakes based on an elevation raster (like SRTM or ASTER)? As far as I can understand, it would mean identifying any cell below the elevation of ...
0
votes
1answer
55 views

Water Quality Data Acquisition Sources

I was wondering what sources are available, or if anyone has water quality data for the Great Lakes and specifically Lake Ontario? We are interested in mapping Phosphorus, Organic Matter, Nitrogen ...
2
votes
1answer
367 views

Lake Maps with changing water levels [closed]

Lots of people crash boats and get injured or die every year because of underwater hazards. I'm trying to design lake maps where the topography and data points change with the water level. Any idea on ...
2
votes
0answers
351 views

Whats the best way to create bathymetric contour lines?

I have a raster dataset with both Topographic and Bathymetric stored in it. What is the best way to create exact contours of the lake-bed? This becomes tricky when I want to make the contour for depth ...
8
votes
1answer
2k views

Watershed delineation taking into account lake/reservoir

My watershed has several big lakes. When I delineated my watershed, I had some unwanted subwatersheds and river segments inside the lakes (see fig. below). I want to tell ArcGIS/ArcHydro to delineate ...
2
votes
3answers
2k views

Looking for bathymetry data for Lake Sakakawea in North Dakota

Navionics has a nice web map that has some incomplete coverage of Lake Sakakawea. Garmin's BlueChart looks to have something for about $160, but appears to be only compatible with GPS units. Don't ...