Bathymetry is the study of underwater depth of lake or ocean floors.

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3answers
741 views

Importing MaxSea 3D Database to PostGIS

I am currently working on a project, where I combine several MaxSea 3D databases, which contain depth measurements made by the echosounder onboard on a ship. The idea is to combine these databases to ...
2
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1answer
29 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 ...
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1answer
31 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 ...
0
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0answers
18 views

Contouring and rendering bathymetric & other attributes in QGIS

I wish to visualise (2d & 3D) and contour point sampled bathymetric and other associated attribute data (biovolume and bottom hardness) in QGIS. The source data files are CSV files consist of ...
2
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1answer
30 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 ...
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0answers
47 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 ...
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0answers
51 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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1answer
319 views

Plotting Smith and Sandwell global seafloor topography grids in ArcGIS Desktop?

Does anybody have any experience with plotting Smith & Sandwell 2-minute Mercator-projected grids in ArcGIS? I've downloaded one in two formats: ers and img. I've found tools for processing .img ...
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1answer
273 views

Creating DEM from cross sections in ArcMap?

I have a DEM in arcmap and cross section of a river which flows on the Dem in Hecras. I now the cross sections are more accurate. I want to make a DEM from some of my cross sections and stitch it on ...
0
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2answers
53 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. ...
2
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0answers
308 views

Turn bathymetry into elevation in arcGIS?

My raster is in depth of bathymetry however when this is shown in 3D it reverses the elevation making the deepest points the highest in elevation and the shallowest points the deepest. This makes a ...
0
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0answers
7 views

S63 Viewers with JavaScript API [duplicate]

I am in the process of developing a web interface for viewing encrypted ENC data (S-63) and was wondering what options are available to handle the rendering? I have investigated ArcGIS Server and it ...
0
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1answer
17 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
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0answers
29 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 ...
0
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0answers
8 views

Using adjustment values to correct for vertical datum in ArcMAP 10, can I extrapolate to cover my raster extent?

I'm using a bathymetry DEM which needs correcting to UK MSL. I have the adjustment values but they don't stretch across my raster extent. Is it possible to extend using a best fit extrapolation across ...
3
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0answers
50 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 ...
4
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3answers
394 views

Creating bathymetric contours using shoreline point data and transect point data

I have been given a set of depth points for a waterbody that were taken along the shoreline and along linear transects. What is the best way to use these points to interpolate/extrapolate bathymetric ...
3
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0answers
175 views

Lake Victoria bathymetric data

I am trying to find bathymetry for Lake Victoria (or portions thereof). Any GIS format and almost any resolution will do. As a last resort a hydrographic chart will suffice.
2
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1answer
43 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
46 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 ...
3
votes
2answers
69 views

Where to get free seafloor elevation data

While I have found multiple sources for continental elevation layers, I have been unable to find sea-floor elevation layers. Specifically, I'm looking for data for the sea-floor around southern ...
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0answers
212 views

Trying to make a depth map of a lake but can't get the 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 ...
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0answers
28 views

NoData value for pixel that HAS data for ArcGIS server Image Service

I have an image service created from a mosaic dataset, I have brought it into a leaflet webmapping viewer and within this I have a tool to identify the pixel values. In this case they are water ...
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0answers
198 views

Interpolate vector layer and raster layer data into regular grid data using QGIS

I'm new to using GIS software. I obtained two different sets of data: Topography data (raster, .asc) Bathymetry data (shapefile, .shp, etc) I include topography data using Add Raster Layer and ...
3
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1answer
1k views

Create a 3D surface from xyz csv using GRASS

Apologies if this is a repeat question guys. I am trying to create a 3D bathymetry surface from xyz data. There is approximately 300,000 points with lat, long and z (depth data). The data is sonar ...
4
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2answers
597 views

Stitching Bathymetry and DEM data together in ArcMap?

I have a DEM built from Lidar data and bathymetry survey points for a river which flows on the DEM surface. My understanding is that Lidar data is not able to capture bathymetry under the river ...
2
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0answers
112 views

How do you merge overlapping .asc files in QGIS with topography and bathymetry?

Firstly, apologies for any incorrect terminology - this is my first time trying to manipulate GIS data. I have two files. The first is higher resolution (SRTM) topography data for a region of islands ...
0
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1answer
46 views

Querying a raster per pixel using a secondary raster as a condition

So here's the problem. I have two rasters containing bathymetry data: one containing the bathymetry of the sea floor, we'll call this raster1, and another containing the difference between two ...
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0answers
37 views

Bathymetry data for Lac Lecointre or estimate data from satellite imagery?

I would like to get any sort of depth data of Lac (lake) Lecointre in Quebec. I've searched all over and can't seem to find any downloadable data. If there is no bathymetry data for this lake is it ...
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0answers
33 views

Create lake bottom substrate class surface from classified points?

I have been getting acoustic sounding data (http://www.biosonicsinc.com/index.asp) and creating bathymetry for several years now, but I am also tasked with creating a substrate surface. I orginally ...
2
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2answers
604 views

How to create contour from NetCDF?

I have downloaded Bathymetry data from GEBCO. Its in NetCDF format. I want to create contour from it. I tried so many tools to convert the file into raster but couldn't do so. How can I create raster ...
1
vote
1answer
96 views

How to change sign of z value in a large dataset?

I have data in an XYZ format (saved as a .txt file) that I am importing into ArcGIS and then converting to a raster using the point to raster conversion. However the Z field in the data represents a ...
0
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2answers
134 views

DEM with bathymetric contour lines in GRASS

I am trying to create a DEM from a bathymetric contour lines. Contours are in vector format and the elevation value is negative. To create the surface I have converted the contours in raster (v.to ...
4
votes
5answers
2k views

Where can I find free Bathymetric data for Indian Ocean?

I am looking for bathymetric data, to place in a map of India for visualization only. I don't really need very high resolution data, since the the map will be at a very small scale: Maybe 1:1Million ...
1
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0answers
82 views

How to get the elevation of the complete sea floor?

I am not a cartographer, I am an analyst-programmer, I know nothing about SRTM, DXF, PostGIS, QGIS... I just saw those names in other questions... Is there a quick guide where I can learn about this? ...
3
votes
1answer
399 views

shortest distance between a raster and another raster

i am using arcgis 10.1 i want to calculate the shortest distance between a raster and another raster. i have a bathymetric raster and an underlying fault plane raster. for each bathy raster cell, i ...
0
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2answers
223 views

Web mapping service with GEBCO bathymetry data

Is there any open web mapping service provide map tiles with GEBCO bathymetry data. As far I know Only Google uses GEBCO bathymetrydata for ocean floor model. Others uses ocean as plain blue. I need a ...
14
votes
7answers
3k views

Looking for interpolation tool to produce river bathymetry (topography) from sections

As per the title, I am looking for a tool that can produce bathymetry of a river from cross sections. Although people who may know such tools probably will not need any explanation why this kind of ...
2
votes
0answers
112 views

Adjusting heights within a DEM raster for visualisation

Problem I have a bathymetry DEM which I want to display in 3D (ArcScene or Fledermaus). The data set is one single raster but looks like it is a mosaic of several smaller datasets. The problem is ...
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0answers
106 views

Convert exported ArcGIS .dwg to 3D rendering on AutoCAD 2013?

We're working on a bathymetry mapping project of our reservoir, digitized as it was built in 1977. I have a polyline .shp for contours and polygon .shp for area between contours with fields including ...
1
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1answer
165 views

Learning about bathymetry?

Besides reading about bathymetry, I would like to work on some hands-on training that I can learn about bathymetry. Is there any good bathymetry out there that I can get some training with the ...
2
votes
2answers
422 views

QGIS, interpolate along an irregular shape or line to create a DEM

Before anyone marks this as a duplicate, hear me out. This question: Interpolation: irregular shape, merging DEM's asks my question but not for QGIS. Furthermore, the answer is vague and not ...
2
votes
1answer
146 views

Bathymetry dataset of Italy

I am looking for a dataset of bathymetry data of Italy. I shall use it in an application for collision avoidance of vessels coming into the port. I need to know how deep the sea bottom is at each ...
6
votes
3answers
1k views

Cutting out depth information in raster. Calculating volume in Qgis

I am trying to calculate habitat volume for around 30 fish stocks in Qgis. I have habitat areas (shape files) and Bathymetric information (.tif file). I believe I can calculate the entire volume of ...
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0answers
205 views

using r.volume model GRASS plugin in QGIS

I am calculating volume of bathymetric data in the form of a clipped raster in GRASS with a Custom Lambert projection centered around 70degrees North, using the module r.volume in GRASS. Side note: ...
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0answers
43 views

Should i use cell registered or grid registered bathymetric data in QGIS?

I am planning on calculating habitat volume over great ocean distances and have the choice to use either Grid or cell registered data, downloadable from this link. ...
3
votes
1answer
203 views

data source for worldwide cross-sections of topographic and bathymetric for woodworking art project?

i am a decent r programmer and statistician, i am able to work with data sets pretty well. i am less familiar with GIS tools, but if given a shapefile i can certainly plot political borders and ...
0
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1answer
22 views

Can I upload an LPA file (Long Profile) to QGIS

I have a .lpa file that I'd like to upload to QGIS - Can this be done and if so, how? Thanks!
1
vote
1answer
105 views

QGIS - View bathymetry info in the status bar

PolyGo suggested that I split my earlier twofold question into separate questions. So: I am new to QGIS or any GIS software so please forgive me if the answer is obvious to you. I wish to view the ...
2
votes
1answer
235 views

QGIS contour plugin exception struck help

I am a fisheries biologist and I am just getting started with QGIS. I took a few GIS classes in college so my GIS knowledge is not extremely high. On to my question. I am trying to make a depth map ...