Questions tagged [bathymetry]
Bathymetry is the study of underwater depths
121
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12 views
TIN interpolation out of extent
I have a problem with the TIN. I just started using QGIS because I no longer have access to ArcGIS. I want to create a reservoir bathymetry map from depth survey points. I created a polyline and ...
0
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2answers
157 views
Creating bathymetry maps using sonar data in SAGA
I am a geologist, however somewhat of a newbie to GIS.
As a personal project, I am looking to create some bathymetric maps of some local fishing lakes.
I am looking to do this using free open source ...
0
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0answers
93 views
Making profile graph in ArcGIS Pro with 2 Rasters
I am trying to compare 2 bathymetric elevation rasters collected using different methods. I am using ArcGIS Pro 2.5.2 and I have 3D and spatial analyst extensions. All data is in WGS 1984.
I have ...
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1answer
48 views
My bathymetric sounder only exports to XYZ file want to input into GRASS
The export file has long, lat, elevation in a float format i.e. -70.8838319778442, 42.3222159164251, -14.6
The file is over 18 MB and each lat/long/elev is MOSTLY 1.5 meter apart and sometime maybe up ...
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0answers
7 views
How to interpret the CDIP 9band energy table
I just stumbled over
http://cdip.ucsd.edu/themes/?zoom=auto&numcolorbands=10&tz=UTC&palette=cdip_classic&ll_fmt=dm&high=6.096&r=999&un=1&pb=1&d2=p70&u2=s:100:st:...
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0answers
146 views
Importing .bag (bathymetry) files into QGIS 3.x
I downloaded bathymetric data from the NOAA Bathymetric Data Viewer website: https://maps.ngdc.noaa.gov/viewers/bathymetry/
I've tried to import and view several .bag files from this website within ...
1
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0answers
178 views
Converting River Channel Cross-Section Data to Bathymetry
I have multiple surveyed cross-sections of river channels and need to convert this data into 3D polylines (shapefile) for use in a hydraulic model. The cross-section data is typically supplied in &...
1
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1answer
34 views
Problem with importing NONNA-100 bathymetry data into QGIS
Total QGIS newbie.
Tried importing Canadian Hydrographic Service Non-Navigational (NONNA-100) Bathymetric Data found here https://open.canada.ca/data/en/dataset/d3881c4c-650d-4070-bf9b-1e00aabf0a1d
...
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0answers
72 views
How to remove slope from DEM to better visualise topographic features of vriver systems in QGIS
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I have a DEM of a river channel that i would like to remove the overall slope but retain features such as pools, riffles, bars etc. I have used the River Bathymetry Toolkit (detrending tool https://...
2
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1answer
128 views
Wrapping a GeoTIFF over the antimeridian in QGIS
I want to make a map of marine sampling locations for a study, and in this context show some bathymetric profiles. So in my map I have shapefiles from NaturalEarth as well as GeoTIFF bathymetry data. ...
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1answer
37 views
Creating a greyscale bathymetry map of the world in QGIS
I am looking to create a greyscale bathymetry map of the world in QGIS which I can then output as SVG contour lines. Maybe there is somewhere where I can find and download greyscale vector tiles of ...
0
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1answer
43 views
Opening multiple text files into a single .tab file in MapInfo
I am trying to open multiple xyz text files into mapinfo to create a table where i can create a raster image of multibeam bathymetry.
Is there a script which will open each .txt file and merge them ...
1
vote
1answer
63 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 ...
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0answers
74 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 ...
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1answer
633 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
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1answer
192 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 ...
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1answer
63 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 ...
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0answers
56 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
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0answers
108 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
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1answer
112 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
1k 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 ...
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0answers
27 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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1answer
583 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
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0answers
148 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
332 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
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0answers
107 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
484 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
2answers
169 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 ...
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0answers
65 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 ...
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1answer
262 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 ...
6
votes
1answer
1k 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
1k 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
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1answer
110 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
153 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
708 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?
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0answers
70 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 ...
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0answers
116 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
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0answers
75 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
1k 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
114 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?
3
votes
4answers
2k 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?
...
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1answer
93 views
Rendering bathymetry data in .cdf format on GeoServer? [closed]
How do I render the ocean depth data on GeoServer?
2
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1answer
321 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 ...
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0answers
42 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
392 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
612 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
172 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
3k 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
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1answer
533 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
471 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 ...
