Questions tagged [ocean]
use this tag when asking questions related to oceans related topics in GIS
0
votes
0answers
19 views
Finding vessel and wave's angle of attack using ArcGIS Desktop?
I am finding angle between ship's heading and component in wave (wave's angle of attack).
Should it be the difference between mean wave direction and vessel's azimuth?
0
votes
0answers
46 views
Changing the color and near ocean with QGIS
The border of region near ocean looks looks very fat. How can I change color of border lines near ocean to make it thicker? I want to change color and thikness of line only near oceans
1
vote
0answers
55 views
Clipping ocean water shapefile in QGIS [closed]
My requirement is to find a reliable source of Ocean water shapefiles, this is because OSM or Geofabrik does not provide this information.
I eventually landed on this page:
https://www....
2
votes
1answer
49 views
Are there any international water bodies codes (oceans, seas, etc.)? [closed]
As you may know, there are 2 letter international continent codes:
AF - Africa
AN - Antarctica
AS - Asia
EU - Europe
NA - North America
OC - Oceania
SA - South America
But what about water objects ...
0
votes
0answers
34 views
Build distance tables from oceanic coordinates
I have a dataset with many coordinates (lat, lng) in the ocean. I want to create a matrix of distances between the coordinates, but I'm a bit unsure if the right way to do it is simply to calculate ...
1
vote
0answers
202 views
Calculating coastal distances using QGIS?
I'm trying to work up some historical transport cost maps, across multiple modes (road/rail/sea/river). I have a polygon shapefile of the coast itself, and point data on the cities of interest (some ...
0
votes
1answer
281 views
How to show Ocean Contours on Mapbox Style?
My users would like to be able to see the ocean contour lines as they zoom in. But mapbox outdoors style only seems to provide contours for land.
I'm not a GIS pro but a web dev, so please keep that ...
1
vote
2answers
64 views
Shapefile for Eastern Boundary Current
I'm looking for shapefiles that delineate ocean current boundaries: specifically one for the Pacific Eastern Boundary current. This is for masking marine productivity raster data onto the current ...
3
votes
3answers
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
vote
0answers
25 views
Islands in pacific ocean [closed]
Recently, I had a question in an exam about the approximate number of islands in the Pacific Ocean. The options were Two thousand, ten thousand, twenty thousand and thirty thousand. The answer given ...
3
votes
1answer
42 views
reshape coastline based on higher resolution ocean layer
I am trying to match one layer representing the land with another representing the ocean, they have the same coordinate system but they don't match because the resolution of the "ocean layer" is ...
1
vote
1answer
142 views
Geolocation of MODIS swath products
When dealing with MODIS swath products (or any swath products from VIIRS, SeaWifs, etc) such as those available here, is there any way of a-priory knowing the location a given file covers?
Typical ...
0
votes
1answer
182 views
Landmasking in SAR geotiff image?
I am working on masking land in a SAR geotiff grayscale image. The image is a tilted one and as I am new to this field, I do not know how to proceed.
Also, I searched about rsgislib which provides ...
2
votes
1answer
168 views
Is elevation (height relative to sea level) constant, despite sea level rising?
Is a 10,000' peak still a 10,000' peak if sea levels have risen a foot? Is it a 9,999' peak now, or is elevation just a constant?
Seems odd that a patch of land a few feet above "sea level" could sit ...
1
vote
1answer
3k views
Looking for Ocean Dataset
This may seem like a very simple request, but does anyone have or know where I can get a shapefile of the ocean around the US? The only thing I can find within my ArcGIS BA is the ocean background, ...
