Questions tagged [bathymetry]

Bathymetry is the study of underwater depths

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How to remove slope from DEM to better visualise topographic features of vriver systems in QGIS

0 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://...
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1answer
65 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
32 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 ...
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1answer
28 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 ...
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1answer
52 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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48 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
179 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 ...
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1answer
148 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
58 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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46 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 ...
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86 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 ...
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1answer
91 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 ...
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1answer
718 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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25 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 ...
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1answer
296 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 ...
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0answers
99 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 ...
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1answer
198 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 ...
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50 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 ...
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2answers
273 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 ...
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2answers
115 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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58 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
222 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 ...
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1answer
645 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. ...
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1answer
958 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....
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1answer
88 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 ...
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1answer
141 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 ...
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1answer
575 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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60 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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111 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 ...
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0answers
73 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'...
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874 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 ...
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1answer
106 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?
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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
79 views

Rendering bathymetry data in .cdf format on GeoServer? [closed]

How do I render the ocean depth data on GeoServer?
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1answer
287 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
35 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 ...
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2answers
366 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
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1answer
537 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 ...
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1answer
161 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 ...
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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 ...
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1answer
394 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
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1answer
396 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 ...
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0answers
250 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. ...
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0answers
323 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 ...
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1answer
409 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.
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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 ...
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1answer
122 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 ...
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0answers
88 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
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1answer
3k 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
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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 ...