Questions tagged [bathymetry]
Bathymetry is the study of underwater depths
111
questions
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1answer
35 views
How to count points of a point layer (shp) for each depth class of a bathymetry vector layer
I am using QGIS 2.8.3 but also have 3.4 whatever works better for this issue.
I have a bathymetry shapefile and a point layer. One of the columns of the bathymetry vector gives the maximum depth and ...
1
vote
0answers
28 views
Getting data from Humminbird ChartSelect .bin file [closed]
I purchased some lake bathymetry data from humminbird chartselect. I can see those data using their applications such as FishSmart or also using the humminbird sonar module. But I would like to read ...
0
votes
1answer
65 views
Opening Lowrance .at5 files in Mac/Linux/Windows
I have some bathymetry data in Lowrance .at5 format. I would like to read those data to my computer and process it (convert it into point cloud etc). Is there any software available to do so? Or is ...
2
votes
1answer
75 views
Mean lower low water (MLLW) for tidal correction
I am estimating water depth (bathymetry) using satellite data over a US water. I have obtained tidal values (datum is MLLW) as at the time of satellite overpass to correct my satellite-derived ...
1
vote
1answer
52 views
Integrating sea level curve data in a bathymetric grid
I am attempting to apply these data recording where sea-level was in the Gulf of Mexico (in meters below mean sea level) over the past 20,000 calendar years at a 500-year resolution in ArcMap:
What ...
0
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0answers
35 views
Pictures with isobaths to a 3D Model in a Browser
I have pictures of lakes with isobaths (*). The result should be a 3D model in a browser.
I tried to make a vector image, but this results in a SVG. I can not import it.
How do I make a layer of the ...
1
vote
0answers
45 views
Combining Bathymetric and Elevation Data using R?
Here is some elevation data of some islands.
I wish to add depth info to the water. With the generous help of @Spacedman at Overlaying elevation data and bathymetry data in R? I get:
To resolve the ...
1
vote
1answer
64 views
Overlaying elevation data and bathymetry data in R?
I have two layers that cover approximately, but not exactly, the same area.
One is land elevation of some islands. The other is the depth of the water around the islands. I can resolve the vertical ...
4
votes
1answer
343 views
How to Loading BAG file format in QGIS
I need to load a BAG file (Bathymetry attributed grid) in QGIS (3.4) according to the supported file page https://www.gdal.org/formats_list.html it is supported, but is not compiled by default and ...
1
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0answers
23 views
How do I compare multiple years worth of geomorph changes in a river while drawing one profile line?
I have many years worth of DEMs of a river I'm studying.
I'm very, very new to ArcGIS (think one intro class), and learned how to use the 3D analyst tool.
What I'd like to be able to do, is to draw ...
0
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0answers
88 views
Using spline / IDW interpolation for bathymetric profile of lake bed in ArcGIS Desktop?
I have partial bathymetric / topographic coverage at 1m resolution of a lake bed and shore and am trying to find an appropriate method for 'filling in the gaps'. I have tried using the following in ...
0
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0answers
21 views
Assessing mapping accuracy of a DEM with different resolutions
I am mapping conical shaped depressions on the seafloor and would like to know at what resolution of the DEM is my mapping accuracy affected by. For example if I have a DEM of 7 metres, what does the ...
-1
votes
1answer
111 views
Reading bathymetry for coordinate with Python? [closed]
I need the water depth at specific coordinates and my geoscientist are offering me a dataset in either TIFF or XYZ/txt format with data points each 2km.
I will typically be extracting about 1000000 ...
2
votes
0answers
59 views
How to correct depth values with tide data? [closed]
We are trying to derive bathymetry using sentinel images using QGis 2.18.
The training data is from a boat gps track taken in 2 days. The depth value captured needs to be corrected for tidal ...
0
votes
1answer
108 views
How to separate or cut the elevation from bathymetry raster TIFF file with vector layer coastline in QGIS 3.4.3?
I have a raster GeoTIFF file downloaded from GEBCO 2014 which contains bathymetry and elevation.
I need to split in 2 layers the raster GeoTIFF file (layer: Bathymetry and layer: Elevation) using ...
0
votes
0answers
36 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 ...
0
votes
2answers
114 views
Getting bathymetric contours confined only within river banks using QGIS?
I have bathymetric survey data in the form of XYZ. X and Y are coordinates while Z is river bed level (elevation) from a datum. These are about 14000 irregularly located points within a river. Now I ...
4
votes
1answer
80 views
Measuring distance from gridsquares to contours of a shapefile
I have a baselayer (.shp file), with bathymetric contours. I want to measure the distance from each grid square in a grid, to the nearest nominated depth (so was hoping to have a way to also nomate ...
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 ...
-1
votes
1answer
154 views
SRTM/DEM 1m resolution (batymetri) to point [closed]
I have bathymetry data (1 huge data) =
SRTM/DEM/FGDBRaster (0,9818m resolution pixel, floating, 32 bit, 45 GB size)
and an alternative data (split into small pieces data) =
same data but with 1m ...
5
votes
1answer
329 views
LiDAR returns over water bodies?
I have obtained LiDAR data from my environmental agency in order to obtain the relative heights of each watercourse station. A far as I know, LiDAR signals do not get returned over water bodies. ...
1
vote
1answer
588 views
XYZ bathymetry to Raster?
I have some XYZ bathymetry data in an irregular, non north-up pattern -- i.e. not gridded. It is saved as a CSV file.
443564.526,6636541.778,-105.47
443564.526,6636538.778,-105.44
443567.526,6636544....
1
vote
1answer
57 views
Applying single symbology definition to multiple TIFFs in ArcMap?
I have 143 separate TIFF files representing bathymetric data, all with different data ranges (high/low values). I want to create and apply a single symbology file having 6 levels corresponding to 6 ...
0
votes
1answer
136 views
Automatically detecting relief in flat areas from hillshape for marine bathymetry using ArcGIS Desktop?
I am trying to identify areas of interest in the ocean around 30-150 m that have some "topographic relief" compared to their surrounding areas. I did this manually by looking at the hillshade and ...
0
votes
1answer
440 views
Data for depth contours/DEM for Mediterranean sea
I am searching for data for depth contours for the Mediterranean sea, especially the Aegean sea in any format (raster, shp). Does anyone know if there are any free available data?
1
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0answers
56 views
Need some help with a hillshade [duplicate]
I've been using GIS for a dissertation project and am having a little trouble with using a hillshade on a specific DEM.
My project is looking at Cyprus, and as such I've looked around and found a ...
1
vote
0answers
100 views
Interpolating sparse bathymetry to correct global grid using ArcGIS Desktop?
I am using ArcMap 10.5.1
I am trying to update a global bathymetry grid (at 1 min resolution) with local sounding data (resampled to 1 min resolution). The sounding data is sparse and irregular in ...
1
vote
0answers
68 views
Getting bathymetric slope data on ArcGIS Desktop from ASCII file? [closed]
I have a project in which I have to project XYZ ASCII file data to get a DEM. It's my first maritime map, any ideas which tools should I use?
I have already tried the Spatial Analyst Tools and haven'...
3
votes
0answers
581 views
How to view Navionics bathymetry Web API in QGIS?
I am looking to view a Navionics bathymetry map in QGIS. The maps can viewed in a browser on the Navionics website here: https://webapp.navionics.com/?lang=en#boating@6&key=%7B%7DoiGbyvcN
Is it ...
4
votes
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?
4
votes
4answers
1k views
bathymetry (Ocean Floor depth) data - API or similar
I am looking to extract the ocean floor depth from a given lat/lng.
Research has lead me to lots of sources. Does anyone have any words of wisdom or good sources or the best way to achieve this?
...
-1
votes
1answer
68 views
Rendering bathymetry data in .cdf format on GeoServer? [closed]
How do I render the ocean depth data on GeoServer?
2
votes
1answer
247 views
GRASS GIS: Interpolate DEM from irregularly spaced coastal survey data
I am attempting to interpolate the elevations of data sets of cross-shore survey transects. The data set size range from 50k to 300k points with ~100m between the transects and 1-5m between the points ...
1
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0answers
30 views
Dynamically coloring a terrain surface based on extent/visible elevation
This application is being developed using ArcGIS JS.
I have a 3d rendered terrain surface of the ocean floor. I've created a raster file to represent this 3d surface, created a tile-cache from said ...
5
votes
2answers
336 views
Converting sign for a 32-bit GeoTIFF with an open source tool?
I have a 32-bit GeoTIFF that represents floating point elevation values, and I'd like to change the sign so that the values are negative instead of positive.
What is the easiest way to do this using ...
3
votes
1answer
433 views
Suggestions for Demto3d parameters
I'm trying to model the great lakes bathymetric data for a cnc. I'm using Qgis to handle the conversion
The Geotiff was obtained from https://www.ngdc.noaa.gov/mgg/greatlakes/erie.html
using the ...
0
votes
1answer
148 views
Calculating distance to 200m depth in bathymetric raster layer using ArcGIS Desktop?
I have a bathymetry layer and I would like to be able to calculate the distance to the 200m depth in the bathymetry raster in arcmap 10.2.
How would I go about this?
I've tried the Euclidian ...
4
votes
2answers
2k views
How to achieve parallel Kriging in R to speed up the process?
I have tried the gstat package in R to perform bathymetry predictions based on Kriging interpolation methods. However, the process is very time consuming due the large amount of sampling data I'm ...
1
vote
1answer
311 views
Raster appears smooth when created but pixelated when opened again
I have a set of xyz points that I want to turn into a raster format for bathymetry. I am using the Topo to Raster (3D analyst) tool and using the depth as the Field and PointElevation as they Type. ...
3
votes
1answer
346 views
Interpolation problem: Spline with barriers
I want to create a bathymetry map of a gulf using spline with barriers.When the interpolation finished the map in the gulf was created very well but a value is also created around the island. I tried ...
4
votes
0answers
209 views
Bathymetry Interpolation in QGIS [duplicate]
I'm trying to create an interpolation of xyz data in QGIS. The data has successfully interpolated, but there is some strange striping or banding on the final result that I cannot seem to get rid of. ...
1
vote
0answers
272 views
Bathymetry map (DEM) and the reservoir Volume from bathymetry points
Could anyone provide me with a workflow from POINTS --> Bathymetry map (DEM) and Volume calculation in ArcGIS?
I would like to create a bathymetry map (DEM) and calculate the volume for a large ...
0
votes
1answer
344 views
Where is the Bathymetry toolbox in ArcMap
I can't find the Bathymetry toolbox on my ArcMap 10.4. I went to the customize toolbar but there is no sign of it. I searched in but nothing shows up.
1
vote
1answer
2k views
Creating Bathymetry using .DAT file format in ArcGIS Desktop?
I have the bathymetry data in .DAT format and I want to create the bathymetry map in ArcGIS but don't know how to do that. I know how to create DEM from elevation data points but have never used .DAT ...
1
vote
1answer
115 views
Finding vertical datum for bathymetry layer?
I was given a layer that shows bathymetry, and I need to list the vertical datum for the it on the map.
Is this somewhere in the layer properties?
I only see datum. I don't know the source for the ...
1
vote
0answers
83 views
How do you find the longitudinal and cross sectional profiles of polygons?
I am currently carrying out a research project involving submarine canyons. The canyons are mapped as polygons and I need to find the longitudinal and cross sectional profiles of the canyons. Each ...
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 ...
4
votes
4answers
6k views
Downloading bathymetric data for free?
I always wondered where cartographers get their bathymetric data from to create maps like the Zanzibar map on wikipedia for instance. I could download polygons for the 1000 meter polygons on ...
-1
votes
1answer
418 views
Finding service URL of WMS for bathymetry data?
I don't seem to find the link to download the bathymetry data from this site.
https://www.geoseaportal.de/gdi-bsh-portal/ui
2
votes
1answer
261 views
How to perform an anisotropic Elliptical Inverse Distance Weighting (EIDW) interpolation in R?
River bathymetry is generally more variable in the transverse than the streamwise direction, so I need to use anisotropic interpolation technique like Elliptical Inverse Distance Weighting (EIDW) (see ...
