For questions about the geodetic functionality of Mathematica, including the functions FromDMS, GeoPosition, GeoDistance, GeodesyData, and FindGeoLocation.

learn more… | top users | synonyms

13
votes
2answers
543 views

How can I generate an interrupted projection of a world map?

How can I generate a world map like the one here, but for an arbitrary hand-drawn map? For example, starting from scratch, how can I manipulate this world map to get something that looks like ...
24
votes
2answers
1k views

Peirce's quincuncial projection

The Peirce quincuncial projection is the cartographic projection of a sphere onto a square. In short, I would like to see it implemented in Mathematica. Here is my code: ...
3
votes
2answers
51 views

GeoRegionValuePlot not using ColorFunction colours

I have a custom Blend for use with GeoRegionValuePlot's ColorFunction option. ...
2
votes
0answers
33 views

How to specify image quality for GeoStyling “GeoImage” in GeoGraphics?

I am creating plots (ContourPlot, SmoothDensityHistogram, etc.) that I then need to project onto geographic polygons. When this ...
2
votes
1answer
109 views

How to align GeoGraphics “GeoImage” with GeoPositions?

I have latitude and longitude locations that I need density (or contour) plot to overlay on a map. For example: ...
45
votes
6answers
10k views

How do I plot coordinates (latitude and longitude pairs) on a geographic map?

I'm attempting for the first time to create a map within Mathematica. In particular, I would like to take an output of points and plot them according to their lat/long values over a geographic map. I ...
4
votes
0answers
45 views
14
votes
2answers
136 views

Why does the GeoGraphics Frame show different Latitude than GeoPosition?

The map looks right, but the Latitude in the Frame looks wrong. Am I making a mistake or is this a bug?
4
votes
1answer
105 views

Creating a latitude longitude image

The GeoPosition of Eureka, California is: GeoPosition[{40.7933, -124.155}] Has anyone ever created an image of the world with ...
7
votes
1answer
130 views

Wrong bearing between two GeoPositions compared to Google Earth

I'm trying to calculate a bearing (degrees, distance) between two points, a and b. From Google Earth I have two points and the ...
1
vote
0answers
330 views

Automatic inverse for Lambert’s Azimuthal Equal-Area Projection

I’m interested in finding closed-form inverses for map projection equations in general (of course, this is not always possible). I’m hoping Mathematica can help me with some of the trickier ones. As ...
5
votes
1answer
40 views

How to control style of GeoScaleBar?

I'm plotting the GeoScaleBar over satellite image and wish it to be white but cannot find an option which controls its styling: ...
19
votes
1answer
358 views

How to use WikiMapia as GeoServer?

I wish to use the Wikimapia map as background in GeoGraphics. According to the Wikimapia Docs, Wikimapia's URL is encoded as follows: An example Wikimapia URL ...
16
votes
2answers
2k views

How do I map a Mollweide projection onto a sphere?

I have this Mollweide projection of the Earth circa 600 million years ago (http://jan.ucc.nau.edu/~rcb7/370moll.jpg).(1) I want to map this onto a sphere. My results have big black splotches in ...
1
vote
0answers
76 views

Convert large KML coordinate datasets to UTM [closed]

I was wondering if there are ways to convert massive amounts of KML coordinates into UTM coordinates using Mathematica. Other programs would also be acceptable. Thanks. I have the KML file from ...
1
vote
0answers
97 views

Plot Multibeam bathymetry grid

I don't speak Mathematica very well, but I am sure I could do great things with this programming language! I will delete this question if it is a duplicate, but I will be glad if you could point me ...
14
votes
4answers
268 views

Administrative Divisions bordering a geographic region (e.g. an ocean)

Update 3 I've worked out a solution that is bearable for a small number of subregions in the neighbour and added it as an answer. I'm going to make a post for optimisation help. Update 2 For a ...
8
votes
3answers
1k views

plotting a {{Latitude,Longitude}} list on top of a GIS shapefile

I have a dataset composed of points specified in {Latitude,Longitude} format. Call it latlong for the purposes of this question. It displays properly with ...
12
votes
2answers
345 views

How to make geometric intersection faster for geographic borders?

I have developed a solution to identify geographic regions bordering a region in this post (94723). Can this functionality be made to execute any faster? Find which entities in a set border other ...
8
votes
1answer
153 views

Does GeoGraphics support Elliptical Mercator projection?

When working on the answer to this question I found that GeoGraphics seemingly uses by default the Spherical Mercator projection (also known as "Web Mercator") ...
19
votes
1answer
384 views

Can Mathematica Export Shapefiles?

Mathematica is great at importing ESRI shapefiles (.shp). Import["http://exampledata.wolfram.com/usamap.zip", "Graphics"] But it seems like it's a glaring ...
10
votes
1answer
311 views

GeoProjection for astronomical data - wrong ticks

Here is an excellent answer to what I wanted to do, and it works like a charm. Unfortunately, when I want to change it a bit, it fails. For setting the stage, here is the datafile, and this is my ...
21
votes
3answers
956 views

How accurate is GeoDistance?

Two years ago I tried an evaluation copy of Mathematica. I reported various inaccuracies in the GeoDistance routine to which I never received any fix. Could ...
6
votes
1answer
32 views

Behavior of $GeoLocationCity within a Block

According to the V10 documentation on $GeoLocation, \$GeoLocationCity gives the city entity for the current setting for \$GeoLocation And since this is ...
1
vote
2answers
217 views

Matrix of boundary distance between countries

I'm trying to generate a matrix of the boundary distances between all countries. First thing I tried was GeoDistance: ...
3
votes
1answer
64 views

Documentation on GeoGridPosition

Wondering where I can find more documentation on GeoGridPosition. Specifically, what formulas does Mathematica use to transform lat/long points to x/y coordinates? ...
1
vote
2answers
117 views

Converting lat/long to x/y coordinates, to generate random variates from a Bivariate Normal Distribution [closed]

I am trying to convert latitude and longitude points to x/y coordinates, generate random variates from a bivariate normal distribution, and then convert those random x/y points back into latitude ...
-1
votes
1answer
66 views

How do I plot lat/long points in the Atlantic Ocean? [closed]

How do I plot lat/long points on the water? Such as the Atlantic Ocean? Here are some points I'm trying to plot: ...
2
votes
1answer
68 views

Plotting Vectors in Mathematic at lat/long positions

I have some current data that I want to plot in Mathematica. The first two columns are the latitude and longitude respectively (longitudes are negative b/c it is west of the prime meridian and all ...
1
vote
0answers
88 views

Geodesy without units?

Suppose I'm interested in the latitude of Los Angeles and I do the following: ...
7
votes
1answer
250 views

Getting the coordinates of GeoDisk[] and similar Mathematica 10 GeoObjects

I'm a big fan of the new Mathematica 10 geographic capabilities and functions such as GeoDisk[], GeoCircle[] and others. One limitation of these functions, however, is the transformation of the actual ...
2
votes
0answers
130 views

Lat-lon contour plots using geographic projections [closed]

I need to create contour plots of (lat,lon) quantities projected on geographic regions using different projections. Usually considering the entire world or hemispheres. Coastlines need to be present ...
4
votes
1answer
196 views

Convert Locator (x,y) values to Lat/Lon as per GetCoordinates on Map

I want to convert the (x,y) coordinates you get from using a locator on a map to Lat/Lon coordinates - exactly like the GetCoordinates tool does when you right click on a map. ...
1
vote
1answer
102 views

Geomarker Scaling

Struggling to get a 3d cylinder to scale properly on a street map. I want to use the stacked cylinder as a custom pin. ...
1
vote
1answer
518 views

How to calculate the distance between UTM-projected coordinates?

My coordinates are projected using the following projection: proj= {"UTMZone32", {"GridOrigin" -> {500000, 0}, "CentralScaleFactor" -> 0.9996}}; Now I wish ...
3
votes
1answer
478 views

Calculate geo location based on distance from other locations

Given a list of entities (or GeoPositions) and their distances from a particular location, how do I find that location's ...
18
votes
3answers
1k views

How can I list all the 'countries 4000 km far from current location'?

A friend said to me on Facebook that she is 4000km away. So I want to try to guess where she is. How can I find which countries are a given distance from my current location?
1
vote
1answer
365 views

{Latitude, Longitude} to Transverse Mercator projection

I have a shapefile with the following "CoordinateSystemInformation": ...
1
vote
1answer
240 views

Correct usage of GeoPosition

My goal is to trace a ray down to the ground. I have done: ...
7
votes
1answer
1k views

How to convert from and to UTM coordinates in Mathematica?

How to use the UTM coordinate system (northing, easting) in Mathematica using the built-in functions (GeoPositionENU, ...
8
votes
1answer
1k views

How can you use and convert Gauss-Krüger-Coordinates in Mathematica?

I am given geographic data in the form of Gauss-Krüger-Coordinates and would like to calculate distances with them and convert them to longitude/latitude coordinates in another system for plotting (e....