Questions tagged [depth]

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1answer
129 views

Interpolation of 3 borehole data

I have three points (boreholes) on the map. I created them using shape file layer. Each borehole shape file layer shows the strati-graphic section of the ground. (i.e. between 0-50 m = Gravel , 50-60 ...
1
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0answers
50 views

Trying to interpolate depth measurements of a pond

We have taken depth measurements across a pond, and have a CSV file with each location's GPS coordinates and depth in meters. We are trying to create a map of this pond showing where the channel is ...
11
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3answers
329 views

Latitude above and below the surface of the Earth

I know that Geodetic Latitude is measured with respect to the normal at a point on the surface of the reference ellipsoid. But what about points above and below the surface? Do they follow a ...
4
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1answer
100 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?
1
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1answer
394 views

Creating a 3D model of a pond using GPS coordinates and associated depth measurements

There is a pond which I am trying to create a 3D model of to view the depth. We have measured the depth every few meters along straight line transects all across the pond, and have GPS coordinates for ...
2
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1answer
446 views

Shortest 3D distance (depth, z) between an underground point and the surface (dtm)

I have a point P1 (see sketch) which is located underneath the surface (DTM). My aim is 1) to find the shortest 3D distance between P1 and the surface (d1 in sketch) and 2) the surface location (P2 in ...
2
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1answer
148 views

How to approximate the elevation of a shapefile in any pixel of a grid using a digital terrain model?

Introduction I am working on some flood maps of a given region. As the data is confidential, I will try to stay as general as possible without any loss of relevant information. The truth is, my ...
-5
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1answer
2k views

Generate flood map using qgis [closed]

How can I generate a flood inundation map and flood depth using QGIS within 3 hours?
1
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0answers
100 views

Calculation appropriate angular step depth in depthmapX

I am a new depthmapX user in which trying to calculate segment step depth from specific segment to store cumulative angles for each segment. Is there anyone who can provide advice to implement it? ...
3
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1answer
128 views

Pond Sediment Volume in QGIS/Grass

I have two rasters, one depicts current water depth and the second depicts the original pond depth. I wish to calculate the volume of the region between the two. -be gentle, I'm a noob.
0
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1answer
73 views

Getting points with lowest value and exact location for each cell?

I have an assignment to create a simplified depth scheme. The calculation has to be done for a large area automatically. There are depth points every 0.5 meters (marked black in the picture). By ...
1
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0answers
37 views

Get the GEBCO 2014 box from latitude and longitute

I am trying to get the information from http://coastal-mapping.eu/ It is a great viewer that shows the depth or altitude of a coordinate and the contour if you select tools and draw a line. The ...
1
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0answers
111 views

Making contour lines out of points with different heights using QGIS?

I have different points in a polygon. The points have the attribute "depth" and either have 0m, 2m or 4m depth. My task is now to create some sort of contour lines with the points with the same depth ...
0
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1answer
357 views

Getting flood depth grid values for road segments?

I have a 2 features, the first contains values for flood depth (Raster, GRID). the other is a road network (vector, polyline) that has been clipped to the boundary of the depth grid. I am racking my ...
1
vote
1answer
373 views

How to combine depth and topography .asc file?

I have a .asc file produced from a hydraulic model. The .asc file contains depth data of flood inundation. I want to superpose the depth asc file with my topography .asc file so I can identify where ...
1
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0answers
452 views

Trying to make a depth map of a lake but can't get the contours to show up right

I am trying to make a depth map of a lake. I am using the contour plugin to generate contour lines. The problem I am having is that when I use the plugin the contours come out right except on the ...
3
votes
1answer
2k views

Recommendations for creating contour map from depth points

I am trying to put together a safe routes map for a local lake. I have an old paper map that has a grid of various depths as points. I would like to draw contour lines through these points and create ...
3
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2answers
1k views

How to create 3D water depth with ArcScene?

I was trying to visualize flood depth in 3D using ArcScene. What I had for this purposes are: high-resolution DTM of the valley orthophoto and Raster with flood depth information. I have draped the ...
0
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1answer
344 views

Getting the depth of properties in ArcGIS

Is there a way to get the depth of a parcel in ArcGIS Basic (or QGIS)? Depth meaning the distance from the road (frontage) to the rear of the property. I should also mention that not all parcels are ...
7
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4answers
1k views

How to calculate the “depth” of a linestring using postgis

I have linestring features, which look like bent linestrings, hemicycles or convex or concave linestrings. In the moment I can select the distance between the startpoint and endpoint of each feature. ...
2
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0answers
159 views

Applying depth to Shapefile

Apologies if this question has been answered before. I'm digitizing a historic coastline and would like to add a single depth figure to it in order to merge it with a current contour model. Is there ...
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 ...