Questions tagged [marine]

Questions relating to the sea or ocean.

0
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0answers
20 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?
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2answers
51 views

How to convert point data to different sized polygons representing Marine protected areas?

I am trying to map Marine protected areas. I have collected data of where all these areas are. The data is expressed as point data (seen within the top image). Within the attribute tabled I have a ...
5
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1answer
151 views

Measure distance between nearest points in the sea along the coast automatically in ArcGIS

I have global point data of marine species along the coast. I would like to measure the distance between the two closest points but this distance needs to be measured in the sea and not on the land ...
1
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1answer
54 views

SAR spectral signatures for oil spill detection from different sensors

I have a rather general question about supervised classification for oil spill detection. I want to apply supervised classification on the ESA SNAP dark spot detection tool results. My question is: if ...
3
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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
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0answers
80 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 ...
3
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1answer
133 views

Maritime zones information?

What is that borders in the water on OpenStreetMap maps? Is this some of maritime zones? Is this "territorial waters", i.e. 12 nautical miles away from borders? What is between islands? Where/how ...
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1answer
85 views

Are there any large maritime data sets? [duplicate]

Needs to have from port, to port, and time stamps for each (arrival, departure times) Is there a dataset with all of this, or will I need to combine some other ones?
2
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1answer
641 views

KML/KMZ file <10MB for global shipping lanes?

I am trying to render an overlay of the world's shipping lanes using google KmlLayer class from the Javascript V3 API but most of the files I find are not rendered because of google's 10MB size limit. ...
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0answers
462 views

Computing Shannon-Weiner biodiversity index using QGIS? [closed]

I wonder if anybody has some experience in calculating biodiversity index (such as Shannon-Weiner) using QGIS? I am also interested for similar experiences using R scripts within QGIS. The analysis ...
1
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1answer
2k views

Seeking Marine Traffic Routes Data?

We are planning to implement a routing application to monitor marine traffic. The issue is that we either need a data set that has international sea traffic routes data or a clear definition of it. ...
2
votes
1answer
985 views

Extract all unique values from a RGB raster

I have a .png file in RGB format showing the intensity of ship traffic: For my analysis I need to convert it to a one-band raster with values between 0 and 1 where 0 means lowest density and 1 means ...
1
vote
1answer
371 views

What is the coordinate system of this maritime natural gas field map?

The Israeli Ministry of Natural Infrastructure, Energy and Water Resources published a maritime map of the borders of a new natural gas field. The map is a part of a full license (PDF), a legal ...
3
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2answers
1k views

Volume of Land Below Sea Level

How could one use a GIS (or other appropriate system) to calculate the change in mean ocean levels across the world if all the land below sea level were flooded (Death Valley, Caspian Depression, Afar ...
4
votes
3answers
300 views

How does GIS intervene in ports and coastal areas?

I guess my question is pretty clear and yet broad, but what I was kind of hoping for is some insight on how GIS would be helpful in managing the ports or coastal areas. I can imagine it could serve ...
2
votes
0answers
737 views

Seeking free nautical route planner Data?

I don't really need an application, but rather an API. I plan to develop my own application and don't need someone else's GUI, just their information. I want to know the distance a vessel at sea must ...
5
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3answers
5k views

Seeking free nautical route planner

Not actually a route planner, but it amounts to the same thing. I want to know the distance a vessel at sea must travel between two points. Obviously this isn't just a straight line thing, if there ...