Questions tagged [geography]

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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3
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1answer
109 views

Plot a Map of German Bundesländer with specified colors assigned to them

I would like to draw a map of the German states ("Bundesländer") with Mathematica 12. I found examples how to outline countries. But I need the next smaller levels. I have not found anything ...
3
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1answer
104 views

Is it possible to get a graph for Taiwan water area

I tried to get a graph for water area in Taiwan, but somehow it doesn't seem to work: ...
2
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1answer
82 views

Can a ListPointPlot3D be overlayed with map

I am trying to make a graph of earthquakes (position and depth) shown on map of the country. The map is drawn with Graphics3D option with the code: ...
1
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1answer
85 views

How to output Polygon with latitude and longitude set in EntityValue function?

I used EntityValue to represent a map of a country. ...
12
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4answers
2k views

How can we find the longitude that cuts all the land on Earth in half?

Mathematica has already a specific function, RegionCentroid, that can be utilized to calculate the geographic center of any region. As it has been discussed in here ...
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0answers
18 views

How to manipulate time on a geographic map

First I've input: ...
4
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1answer
90 views

How to show net income geographically of a company in a certain city

Let's say that I have a company, and I already extracted it's net profit with time series. ...
13
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1answer
1k views

Are Mathematica's maps copyright-free?

Are the maps available in Mathematica copyright-free? For instance, if I generate the image ...
0
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1answer
41 views

How to prevent small locations from being plotted as points when using GeoListPlot?

When a location is too small, GeoListPlot marks that location using a point on the map. For example, ...
5
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1answer
70 views

Improving performace of `GeoDistance` and `NearestNeighborGraph`

I am trying to construct a NearestNeighborGraph of the 3143 US counties, using their latitude and longitude positions. ...
4
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1answer
66 views

mapping a digraph across sectors of countries

Given a (9,9) matrix representing three countries (for example, the US, China, Russia), each one of which has three sectors (vertices/sectors {1, 2, 3) for the US; {4, 5, 6} for China; and {7,8,9} for ...
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0answers
86 views

OceanData not deep enough or just too deep for me?

It's exciting to see Mathematica/Wolfram Alpha addressing the marine realm in Version 12.2. Evidently, I was unaware that such data existed since Version 12.0 introduced in 2019. However, I have two ...
3
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1answer
66 views

How to determine population from a list of arbitrary jurisdictions (cities, states, counties, et al.)?

I am an aspiring data scientist who's working on a passion project, namely to assign danger-level scores to police departments in the United States. One specific metric I'm developing results from ...
2
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0answers
66 views

Where can you get by walking half a mile?

I recently saw that Mathematica 10 introduced really nice tools for geography. I would like to use GeoGraphics to visualize all possible paths with a length of half ...
13
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3answers
3k views

Oak Island, extending the "Alignment", possible Great Circle?

During these days of COVID, I indulged in the guilty pleasure of watching The Curse of Oak Island - Season 8, Episode 4 Alignment, which viewed last night (1 Dec 2020). During the episode, some "...
0
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2answers
142 views

Get coordinates of the boundary of a continent

I'm trying to obtain the coordinates of the border of the continents. I need this information to be ordered such that when I do, for example, ListLinePlot[data] It ...
2
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0answers
27 views

Difficulty with getting local GeoPosition correctly

I am using the wolfram cloud on a Chromebook and when I type the function Here it returns a faulty ...
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0answers
38 views

Shifting GeoRange depending on Projection Problem

It's been rather smooth progress lately using GeoGraphics as I attempt to render different polygons over the greater metropolitan Vancouver area. I found this ...
4
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1answer
95 views

Heatmap, visualizing on negative/positive values with Cartography

I want to create a heatmap in relation with a CityMap. A example of my dataset is: ...
2
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1answer
134 views

3D Plot of mountain elevation on a map

I am trying to plot mountains' elevation on a map. Right now, I have a 2D image generated using the code as shown below. I hope to create a 3D plot, on which, at z=0 is the map, and at each coordinate ...
0
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1answer
45 views

GeoGraph based on (x,y)-coordinates

To create a Geograph we use a longitude and latitude to visualize the exact positions. I work with a database without the lon/lat. Instead of that, my database has a X and Y coordinate. I know, there ...
1
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1answer
30 views

GeoRegionValuePlot Leaving Out Metropolitan Census Tracts

Preamble Run this code in the preamble for a working example of what I'm dealing with. Census Tract Entity Store ...
3
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1answer
52 views

States surrounding/adjacent to a given state

I want a function that gives a list of all states adjacent to a given state. How can I do this in Mathematica?
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2answers
239 views

How to compute a list of cities within a given radius of another city?

I have hitherto found a solution to this problem. Designate a city in the continental USA as cityCenter. Make a table with all large cities in the USA. I could ...
2
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1answer
73 views

Is there any way to speed up many instance of TravelDistance

The goal of this code is to identify and graph a "circle of cities" about a center city. ...
0
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1answer
58 views

How do I write a tooltip for this list of cities?

...
2
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1answer
170 views

How to draw line parallel to the coast on a world map?

The task is to draw a line parallel to the coast 150 nautical miles to the sea, highlighting the ocean between the coast and the line drawn. An expected result is an image (most aesthetically pleasing)...
3
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2answers
107 views

Using Geo commands, how do I get a list of cities that all meet the following criteria

I am looking to list with Geo commands all the cities such that Point is 333 miles from Houston Point is 755 miles from San Antonio Point is 460 miles from El Paso. How do I write up the code that ...
3
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1answer
60 views

EntityClass Downloading Speedup

Running this command. Trying to get all cities more than 1 million people in US. ...
4
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2answers
98 views

How to plot countries with accurate area?

Are there any projections that use the true size of countries, like this?
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0answers
42 views

Use Wolfram Cloud to Create Site Visitor Database

Question: Is there a way to use Wolfram Cloud to create a web API function that, when pinged, does the following: Gets the geographical location of the user (as an Wolfram entity, like ...
4
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1answer
123 views

Distance between two cities

I need help calculating the distance between 2 cities in Wolfram MAthematica. I would need to create two drop-down lists of European capitals. After selecting any two cities from the lists, I would ...
2
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0answers
110 views

How to smoothly zoom into GeoGraphics without label flicker?

I would like to animate zooming into maps in a smooth fashion while showing labels - but without them flickering or jumping: ...
0
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0answers
67 views

Simpler closed form for spherical coordinates of points on great circle?

Short version: how to simplify this expression given these conditions? Note that expr[[3]] is equal to 1, although Mathematica won't simplify it as such. ...
5
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0answers
164 views

How to get 3D building data in map functions?

Most modern mapping APIs have 3D model data for city buildings built-in. For example: Is there some way to get this functionality in the Geography related functions? I believe ...
4
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0answers
65 views

Cloud Deploy dynamic country selection from a map

This is a follow-up question based on the answer I got from Lukas Lang. The original question is here. How can I alter the code to deploy it on the cloud? Or in case this method is only for desktop: ...
9
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1answer
384 views

How to dynamically select a country on a map using the cursor

Let's say I have a map of Europe with a locator in manipulate Manipulate[ GeoGraphics["Europe", GeoBackground -> "CountryBorders"], {{p, {150, 150}}, Locator}] ...
4
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1answer
112 views

Blurry labels in GeoGraphics

I want to keep the same GeoZoomLevel, but increase the resolution of the labels. I'm struggling to control that: ...
2
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2answers
110 views

How to define NumberForm in LegendLabel?

To start: ...
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1answer
89 views

Question about BorderingCounties

I start with: escambiaFL = Interpreter["USCounty"]["Escambia county"] Answer: Escambia County, Florida, United States. Next; evaluate: ...
1
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1answer
109 views

How to build a structured data table

I'm going straight to the task; I start with the following list of Florida counties: ...
2
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1answer
109 views

Getting a list of cities that are located in more than one county (within a state; in this case Florida, USA)

To get the list of counties in the State of Florida, I first evaluate: EntityClass["AdministrativeDivision", "USCountiesFlorida"] which gives me a pill-shaped ...
3
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1answer
74 views

Finding the next total SolarEclipse over a given latitude and longitude?

What is a reasonable way to code the title question in Mathematica? Trying the following gave Polygons over GeoPositions over Lists of pairs, but just digging into these seemed inelegant. Besides, ...
9
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1answer
369 views

Antipodal Land Area Calculation

Mathematica 12 does antipodal graphics! See here for my treatment of antipodal New Zealand. Most of the Earth's above-sea-level land will have ocean at its antipode. Is there a way to calculate what ...
9
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1answer
171 views

How to speed up GeoWithinQ?

GeoWithinQ is a very useful function - is this point within this area? However, it is quite slow. It's not unheard of to have large numbers of points - for instance,...
3
votes
1answer
317 views

Loading data from a shapefile

After saving (with QGis) the part of the map I´m interested in for a local visualization, I have the .zip file where you can see 5 files. I load the map in Mathematica with ...
5
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1answer
170 views

Implementing GeoCallout?

Building off of a related question, I'm looking for a robust way of using Callouts for multiple locations in Geography. For example, I want to plot cities and their ...
4
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1answer
354 views

Extraneous elements in "Europe countries" list [closed]

I found that the list "Europe countries" encloses "Russia" and "Moldova". This is not correct! Any hint?
6
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1answer
320 views

Geography in 3D perspective

I would like to build a GeoGraphics map showing a z-elevated perspective (e.g. the view from a plane). Specifically, I'm looking to use multiple ...
7
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1answer
78 views

Custom alignment for GeoMarkers

I need to align a GeoMarker at the bottom left of the marker: ...

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