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Geographic Information Systems

Questions tagged [bathymetry]

Bathymetry is the study of underwater depths

101 questions
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22 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
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2answers
44 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
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1answer
60 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
40 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
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1answer
70 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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23 views

Is there any way to convert lowrance .at5 to csv or any other readable form from genesismaps

I come to know that there are a lot of freely available lake bathymetry data in https://www.genesismaps.com/ I'm able to download those data in .at5 format. But I would like to have them with x y ...
5
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1answer
114 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
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1answer
137 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
43 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
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1answer
70 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
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1answer
269 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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171 views

Interpolation methods for bathymetric data

I have some bathymetric data for a group of small lakes. Data comes from bathymetic soundings and in some cases it can be a few thousands of points. I need to generate the bathymetric map of the lakes ...
1
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0answers
54 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
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0answers
79 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
46 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'...
1
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0answers
356 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
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1answer
94 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?
2
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1answer
812 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? ...
0
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0answers
343 views

Seeking free bathymetric contour data for North Sea?

I am looking for free Bathymetric contour data in shapefile format for depths between 0-200 meters for North Sea. I prefer contours at 10 meter increments, but will take whatever I can get.
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1answer
52 views

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

How do I render the ocean depth data on GeoServer?
2
votes
1answer
167 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
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
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2answers
254 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
269 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
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1answer
123 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 ...
2
votes
2answers
1k 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
203 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
238 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
162 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
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0answers
229 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
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1answer
211 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
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1answer
961 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 ...
0
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0answers
308 views

Applying a vertical datum (san_diego_navd88.prj)

My source data come from here (San Diego, CA 1/3 arc-second NAVD 88 DEM) The associated .prj file is "san_diego_navd88.prj" and I do not know how to apply it to the DEM I have downloaded. I do not ...
1
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1answer
97 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
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0answers
70 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
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
4k 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
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1answer
307 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
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1answer
228 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 ...
2
votes
1answer
78 views

What is NOS Hydrograph sounding data?

How can sounding data be used for bathymetry when depth is positive? I have downloaded DEM (digital elevation model) as shown in the image below but need bathymetry data for H. All I have found for H ...
1
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1answer
272 views

Interpolating bathymetric data to make a volume estimate

I have 3 m resolution bathymetric data of a lake that I want to use to make a volume estimate of a landslide deposit that is on the lake floor. Basically, I want to interpolate the bathy data to make ...
2
votes
1answer
135 views

How to display data at diffrent depths in ArcScene

I am looking for a way to display data at different depths in ArcScene. I have a bathymetry layer which displays fine, and I want to overlay oil platforms in 3D over the bathymetry to show where ...
2
votes
0answers
102 views

How to make water transparent on openstreemap-carto style?

I have build up manually a tile server on Ubuntu 14.04. LTS, by following switch2osm's guide and have used the openstreetmap-carto style. Now I intend to add a base layer, underneath the current one,...
1
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0answers
571 views

Creating a Greyscale DEM from Multiband (RGB) GeoTIFF in QGIS

I'm trying to merge some river bathymetry with LiDAR from the surrounding riverbed using QGIS 2.14.0 Essen. The river bathymetric data is a GeoTIFF, and it comes with a separate scale associating the ...
0
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2answers
201 views

Displaying multiple sea level scenarios?

I'm trying to display a number of sea level scenarios to discuss landscape differences across time. I've created a CTM of the region now I need to display sea level at a number of reduced levels (e.g. ...
0
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1answer
33 views

Combining two z values with same x and y in ArcMap?

I have a point file with elevation values I want to combine with a raster of the same area. I'm assuming I will need to extract points from the raster to store as a .shp file. Then I need to combine ...
1
vote
0answers
39 views

I have a .adf file and want to select an elevation range [closed]

I'm super new to GIS. I downloaded a USGS 30m resolution map of a bay, and now I want to specify all areas that are between 0m and -30m elevation. I need to find where a defined area contains 0 and -...
3
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0answers
133 views

Building a DEM with both a raster and vector points [closed]

So I'm struggling here, trying to get a decent DEM for the Azores Islands because I want to include bathymetric data on it. I have a raster with elevation for the islands (land) with a 30 meter ...
2
votes
1answer
67 views

Multiple Bathymetry Layers, How to group into one?

I'm an extreme novice to GIS. I'm using ArcGIS (Arcmap) and basically I've got 5 bathymetry layers, and I'm just wondering how to group them into one. Which would allow them to be represented with ...
2
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0answers
156 views

Creating a merged coastal terrain model using QGIS?

I have a bathymetric data set (Float32) and a standard DEM (Int16). I'm struggling to merge them using "Raster>Merge". I've set "nodata" to -9999 using "conversion>translate" this displays the DEM ...

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