# Tagged Questions

Questions on the application of Mathematica to geography, including the use of the CountryData and CityData functions. Not to be confused with geodesy.

255 views

### GeoGraphics examples not running correctly

I'm trying to work with the new GeoGraphics functionality in Mathematica 10, starting with the example given here. None of the code seems to run well for me, though. I try to run the first command: <...
66 views

### Help with GeoRegionValuePlot

I am trying to get a map with 4 colors, I have several regions with values from 0 to 3 and I want to color those regions with value 0 in white, with value 1 in yellow, with value 2 in orange and with ...
72 views

### Drawing a circle with radius = 40 miles around Bunnell, Florida

The following works: ...
118 views

### Cannot combine GeoPosition polygons in version 10.4

I was using with Mathematica 10 for plotting different kinds of maps the function PolygonCombine. It seems that this fucntion has disappeared with the version 10.4? Here is a classical example for the ...
34 views

### Trouble Converting From GeoGridPosition with Equirectangular Projection

A simplified version of my code is: ...
47 views

### Anomalous scaling in GeoRegionValuePlot when using non-default color scheme

I found this plot online, and thought "I bet I could do that with a one-liner using GeoRegionValuePlot". But then it turns out that you are much better off ...
148 views

### Rotate Geographic map

I want the map to be rotated by -45 Degree. I want to coast to be horizontal (perfect -45 degree). I already have: ...
4k views

### Composition: how to make a day and night world map?

Given the following world images: ...
27 views

### Remove surface from graphic [duplicate]

How to remove surface from the following graphic? I need only Mesh, (black lines). ...
130 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?
39 views

### How to test if a GeoPosition is inside a geographic Polygon?

I have tried the following: ...
81 views

### Given Latitude, Longitude, and Elevation, how to illustrate a three-dimensional path?

I've extracted detailed path information from a .FIT file and would like to plot this in three dimensions. I assumed GeoPositionXYZ[] would be useful, and have translated the data into a list that ...
37 views

### GeoRegionValuePlot does not show Legends

I have a problem with GeoRegionValuePlot. These are the settings: ...
231 views

### Plots of United States states with non-standard labels

I have data that associates a state with some text (like the name of its biggest insurance company). The states are identified as Wolfram Language entities, e.g. Entity["AdministrativeDivision", {"...
206 views

### Odd Coloring with GeoRegionValuePlot

Bug introduced in 10.0 and persisting through 10.3 or later Bug behavior is version dependent When I'm plotting data with GeoRegionValuePlot, I'm getting some ...
146 views

### Make a list of large cities in Germany

I want to Make a list of large cities in Germany CityData[{Large, "Germany"}] but in Documentation Center answer is in short form How to get the answer ...
1k views

### How to make a 3D topographic globe?

I've made some attempt with this dataset of elevation. But I have some trouble with ListSurfacePlot3D, which can not show the globe correctly: And I've checked that the data is out of problem, ...
141 views

### GeoGraphics Manipulation

So far this is what i have: ...
328 views

### Median household income for each county in Maryland

I found that Wolfram|Alpha knows the median household income for every county in the US. I wanted to get a list of all counties in Maryland, and the median income in each county. The only way I could ...
369 views

### GeoGraphics: problem with GeoPosition in shifted projections

Bug introduced in 10.0.0 and persisting through 10.4.1 A remark about the answer: My work around is only nice for simple cases with points. More general should include proper polygons splitting on ...
297 views

### GeoGraphics - mapping the Moon

The link here shows a nice way to depict the map of the Moon in Mathematica. But is there a way, to center the Mollweide projection onto the far side of the Moon?
740 views

### Building graph based on the cities connection?

I built a Graph based on the permutations of city's connections from : ...
100 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 ...
254 views

### Winkel Tripel and Robinson Projections?

How can I do WorldPlot with the WorldProjection -> Winkel Tripel or Robinson projections. Mathematica has Mollweide and several others defined, but not these popular projections adapted by National ...
140 views

### Why some GeoProjections show just half of Chukotka region (Russian map)

I've moved to V.10.4 and proceed with Russian map (the aim is to geoplot regional distributions of some values). Notice most eastern Russian region - Chukotka. Chukotka, unlike other entities, ...
92 views

### Georeferenced bitmaps

The command Export["filename.jpg", graphic] will export the graphic object graphic to the file ...
39 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: ...
326 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 ...
83 views

### Using SHP files to draw a density map [closed]

My SHP file of census block groups has polygons and associated employment data for each block group. Is there a simple way to draw an employment density map? I've played around with ...
258 views

### CountryData fails for some tags and properties

The problem has gone, presumably resolved by WRI. See kirma's comment. I'm using Mathematica 10.0.2 for Mac, and for the first time just tried CountryData. ...
326 views

### GeoGraphics : path within a country

I am using GeoGraphics to visualize electricity distribution networks in certain countries. I have susbtation location data, as well as network incidence matrices (...
363 views

### How do I remove roads from Mathematica maps?

I'm using GeoGraphics and Polygon[Interpreter["USState"]["Colorado"]] to create a map of Colorado and several bordering states. ...
81 views

### How can I add flags to countries shapes? [duplicate]

Recently, I wanted to create a map showing the flags of the countries. From the documentation, I found and used the following: ...
83 views

### How can I define geographic regions and new entities?

There are three functions (GeoListPlot, GeoGraphics and Entity) related to working with geographic regions but it is not clear from the documentation how to create new Entities or custom geographic ...
455 views

### How does Mathematica know my location?

On the AstronomicalData page in the online reference, it says for AstronomicalData["Sun", "NextRiseTime"] that it finds the ...
340 views

### Zooming using GeoGraphics

Suppose I do: GeoGraphics[Entity["City", {"Eureka", "California", "UnitedStates"}]] What do folks do at this point to zoom in to various parts of the image?
75 views

### Planning flights for a special route

I want to plan a world trip with Mathematica. So I already have the dataset with all the cities I want to visit and the tour (with the command FindShortestTour). So ...
140 views

### RandomPoint in geographic region from Polygon[region_]?

How do you generate a RandomPoint in a geographic region? ...
745 views

### Automatically adjust Russia on the map (Mathematica 10.0)

Bug introduced in 10.0.0 and fixed in 10.1 I'm using Mathematica 10.0 on Windows 10. If I take a map of any country (even continent), it automatically adjusts the size of the map. ...
99 views

### Add single contour line to relief map [duplicate]

I have generated a relief map according to a method shown in Mathematica documentation, viz: ...
422 views

### Drawing CountryData groups

I'm sure I'm overlooking something obvious, but I can't draw groups of countries. Here are two countries and two country groups: ...
261 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 ...
2k views

### show density plot on US map

I have a bunch of data points in the form of {latitude, longitude}. How can I plot their density on a US map? Single points on the map do not clearly show their ...
423 views

### Geographics: Can I get a US Map silhouette without the Great Lakes?

I'd like to get a nice silhouette of the land area of the US lower 48 states using Mathematica's GeoGraphics method. I tried: ...
63 views

### How to get information from map using mouseover?

Assume I have the following zip code data: ...
214 views

### Problem with ListContourPlot feeding data format and WeatherData

With following code I am trying to show the mean wind speed patterns for a few geographic locations. ...
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 ...
64 views

### Combine ReliefPlot with other geographic shapes, like administrative boundaries

How can I combine a ReliefPlot with other geographic shapes? Since the ReliefPlot is just a plain array of values, it is not clear to me how to project it and combine it with other geographic shapes, ...