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Questions tagged [depth]

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Water Depth, Velocity, Depth*Velocity Filtering using QGIS

I need to filter some hydraulic modelling results in QGIS as per the following specification: Exclude areas with a depth less than 10 mm AND depth x velocity (dV) below 0.125 m2/s; Exclude areas ...
Guest's user avatar
  • 1
1 vote
0 answers
59 views

Mapillary depth dataset - am I misunderstanding what depthmaps are?

Mapillary has published a few months ago a dataset of street view pictures along with, according to the website, depth information: "The dataset is generated by running monocular Structure-from-...
Bruno Pérel's user avatar
0 votes
1 answer
150 views

Making polygons from interpolated points in QGIS

I need to know the extension of the area of a lagoon according to depth classes. I started from a point shapefile containing depth values and used the interpolation plugin and I obtained a raster file....
Monia's user avatar
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1 vote
0 answers
334 views

ArcGIS Pro interpolation point data along a line (river depth)

I'm analyzing habitat suitability using river depth data. However, my data are pretty basic: point data of the water levels at measuring stations (so literally points, not cross sections). First, I'm ...
Melissa Vanderheyden's user avatar
1 vote
1 answer
119 views

Calculating average depth of a 250m square using points at 125m spacing using QGIS

I have a set of points spaced at 125m intervals across an area, an average depth value is assigned to each point. I need to calculate from these points a single average depth value for a 250m square, ...
Ewan Kimsey's user avatar
1 vote
1 answer
862 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 ...
Pınar Aksu's user avatar
1 vote
0 answers
103 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 ...
Matt's user avatar
  • 21
11 votes
3 answers
698 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 ...
posfan12's user avatar
  • 245
4 votes
1 answer
233 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?
Tom Smith's user avatar
1 vote
1 answer
1k 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 ...
Matt's user avatar
  • 21
4 votes
1 answer
1k 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 ...
kalakaru's user avatar
  • 562
2 votes
1 answer
297 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 ...
user avatar
-4 votes
1 answer
7k views

Generate flood map using qgis [closed]

How can I generate a flood inundation map and flood depth using QGIS within 3 hours?
Degala Narasimhulu's user avatar
1 vote
0 answers
190 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? ...
HSJ's user avatar
  • 355
3 votes
1 answer
244 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.
Darren Stanley Smith's user avatar
0 votes
1 answer
324 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 ...
Viaceslav Jurkin's user avatar
3 votes
1 answer
577 views

Extracting depth data of nodes of unstructured mesh in QGIS

I am currently working on a project which requires unstructured meshing of a given area. Also, i need to extract the data such as nodes x-y coordinates, cell data (triangular cells in my case) and ...
Akshay Pandit's user avatar
1 vote
0 answers
59 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 ...
Juan Pablo Garcia Coello's user avatar
1 vote
0 answers
148 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 ...
qgs's user avatar
  • 288
0 votes
1 answer
462 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 ...
cl3's user avatar
  • 1,946
1 vote
1 answer
554 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 ...
P. Anisa's user avatar
  • 121
1 vote
0 answers
524 views

Making depth map of lake but cannot get 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 ...
Chad Washington's user avatar
2 votes
1 answer
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 ...
Seoras Ray's user avatar
3 votes
2 answers
2k 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 ...
Zaman's user avatar
  • 211
0 votes
1 answer
460 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 ...
rspencer38's user avatar
10 votes
4 answers
2k 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. ...
Stefan's user avatar
  • 4,424
2 votes
0 answers
255 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 ...
Stew's user avatar
  • 83
2 votes
3 answers
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 ...
sirgeo's user avatar
  • 2,049