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

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13
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3answers
1k views

Flying to Australia

I want to compare different flight routes to Australia and their lengths. So far I have written: ...
4
votes
1answer
164 views

What should I do if the geographical map provided by Mathematica doesn't show some rivulets?

I have a list of geographical coordinates(maybe the coordinates are not that accurate, but the problem is not that vital): ...
10
votes
2answers
166 views

How can access to curated data needed by GeoRegionValuePlot be speeded up?

Seems that GeoRegionValuePlot requests data from the internet multiple times to process its plot. As an example, let's graph smoking per capita worldwide. ...
4
votes
3answers
444 views

How to correctly project heat map onto map

I'm importing the NGA ASAM piracy database into Mathematica for analysis. ...
3
votes
1answer
382 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 ...
13
votes
1answer
325 views

Geographic background containing both outlines and contours: how?

I would like to create a map which will show lakes and rivers together with elevation contours and contour labels. What is the simplest way to do this with ...
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
3answers
421 views

Visualizing data on a world map - flexible record format

I have a list of members of a team, and I want to create a visualization on a world map. I want to plot them on a map, to see some clustering. The fields are: ...
9
votes
1answer
1k views

How to combine more locations (GPS coordinates inside one city) with Google map?

I have a list of GPS coordinates.E.g. GPSList = {{47.680800, 17.626446}, {47.681078, 17.627283}, {47.682759, 17.631810}}; I would like to crate a Google Map ...
13
votes
1answer
814 views

Map of Specific US States? (Isolated)

My question here is fairly basic, and I'm sure I'm overlooking something basic. I know about CountryData for creating shapes of entire countries, and it works, to ...
4
votes
2answers
391 views

How to get a country's official languages?

According to Wikipedia Of the 193 widely recognized countries, 178 have an official language at the national level (NB:or more than one) The only exceptions are: Cyprus, Czech Republic, ...
4
votes
1answer
376 views

How do I convert from NAD 83 State Plane Coordinates to Latitude and Longitude?

I am trying to convert NAD 83 State Plane New York Long Island coordinates to Latitude/longitude. Below is my code - what am I doing wrong? ...
2
votes
1answer
131 views

Distances of locations in the matrix form

I want to have the distances of the cities in the matrix form.How can I have it for example for the cities like followings that also includes the distance of the city from itself which is zero: ...
8
votes
1answer
364 views

Is it possible to construct a topological map of road network of Bangalore?

I saw this example wherein the CityData gives the map of a city. But this is available for a relatively small set of curated regions. Is it possible to extract ...
17
votes
4answers
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 ...
5
votes
3answers
400 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: ...
4
votes
1answer
648 views

How to create an interactive map of the 50 states showing certain data in tool tips boxes for health care policy development?

To create a means of displaying information about the distribution of primary care providers, the population density and the average yearly Medicare expenditure per enrollee for each state, I would ...
2
votes
2answers
445 views

City/Country Names by GeoLocation

How do I get the city and country names from the output of FindGeoLocation[] {lat, long} ?
20
votes
1answer
824 views

xkcd: Geohashing in Mathematica

On May 21, 2008, an xkcd comic proposed a method for creating a random, local meeting place that can't be determined until the day of the meeting. This method is usually used for xkcd fan events, ...
4
votes
3answers
186 views

Maintaining map dimensions after using Colorize

I am trying to beautify a map by using Colorize as demonstrated in the Mathematica documentation. First, I import a shapefile from DIVA-GIS for France which ...
0
votes
1answer
197 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. ...
1
vote
2answers
187 views

Indicating the probability that a weather datum is above/below some given value on a geographic map

With help of the previous questions here, I am analyzing weather data as daily MeanWindSpeed of some cities with the following code: ...
6
votes
2answers
349 views

Why is CityData[All, “Coordinates”] failing?

When I evaluate CityData[All, "Coordinates"] Mathematica returns {Missing["NotAvailable"], Missing["NotAvailable"]} ...
5
votes
1answer
559 views

Geocoding addresses to geographic coordinates

I am writing a research proposal for a project on voter turnout as related to proximity to mass transit. The first part of my project would require geocoding hundreds of thousands of addresses, but ...
8
votes
3answers
997 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 ...
9
votes
2answers
1k views

Using J/Link to decode Google Maps Polyline strings

I would like to use this java code inside Mathematica using J/Link. It converts Google Maps API Encoded Polylines to a list of points. I tried the Mathematica tutorial but got lost. There is the Java ...
13
votes
1answer
440 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 ...
15
votes
1answer
424 views

CountryData and the areas of the world

If I add the WaterArea and the LandArea of the world, I get the same number as if I asked for the total area of the world in the first place: ...
18
votes
3answers
1k views

Highlighting individual countries on a world map

Consider the following list of countries which I would like to highlight on a world map: ...
18
votes
1answer
683 views

Using Texture to color countries according to their timezones

So I'm trying to make a world map, where each country is colored according to its timezone. Except, for countries with multiple timezones, the country is filled with vertical stripes of colors ...
40
votes
1answer
2k views

Google Map in Notebooks?

Using Mark McClure's GPXToGoogleMap results in a HTML and Javascript code which can be viewed by any browser. Is it possible to load this map into the notebook, which obviously means for example that ...