# Questions tagged [coordinate-system]

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### Derivative of the Unit Vector in Spherical Coordinate system

I have a doubt regarding a step in the derivation of the momentum equation in spherical coordinates. I am referring to the textbook "Fundamentals of Atmospheric Modeling" by Mark Jacobson, 2nd Edition,...
0answers
57 views

### How to calculate 'real-world' geometric height from ERA reanalysis data

This seems like a really simple question, but I have been struggling for a couple of days to find an answer online or in the ERA documentation. I am using ERA5 and ERA Interim reanalyses to get ...
3answers
137 views

### How large is the area covered by coordinates XX°YY'ZZ“N/XX°YY'ZZ”E?

As stated in the title, I wonder how large the area covered by certain coordinates actually is, when they have the accuracy XX°YY'ZZ", for example: ...
0answers
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### Determining Horizontal Coordinate System data (azimuth, altitude) for geographic locations

I would like to determine, specifically, azimuth and elevation data for any given location on the surface of the earth relative to another location on the surface of the earth (for my purposes, the ...
0answers
42 views

### What is the Offset Corner Latitude and Longtitude?

I tried to understand about Offset Corner Latitude Point 1,2,3,4 and Offset Corner Longitude Point 1,2,3,4. But I couldn't understand what is it? For example, I have the Frame center Latitude and ...
2answers
125 views

### Is the representation of Earth oriented correctly in this image?

Is there something wrong with this image? I found it in Wikipedia's article Ecliptic coordinate system and the image's source page is here. What bothers me is the orientation of the Earth's surface (...
1answer
42 views

### Projecting rectangular stereography centred on 42°N, 10°E

I am reposting from GIS Stack Exchange as here might also be someone who might help: I have a precipitation GRIB2 file obtained at EUMETSAT H-SAF I am able to decode it to ascii but the software I am ...