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.

Filter by
Sorted by
Tagged with
0
votes
0answers
27 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
votes
1answer
83 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
votes
1answer
80 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
votes
1answer
40 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
vote
1answer
22 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
votes
1answer
48 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?
0
votes
2answers
70 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
votes
1answer
68 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
votes
1answer
50 views

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

...
2
votes
1answer
143 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
votes
2answers
86 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 ...
0
votes
0answers
22 views

Importing Esri ASCII raster format

Does anyone know whether Mathematica has a built-in function to import Esri ASCII raster format data as described at: http://resources.arcgis.com/en/help/main/10.2/index.html#/...
3
votes
1answer
54 views

EntityClass Downloading Speedup

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

How to plot countries with accurate area?

Are there any projections that use the true size of countries, like this?
1
vote
0answers
35 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
votes
1answer
104 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 ...
1
vote
0answers
62 views

Counting the number of continents

The definition of continent varies depending on: What is the minimum area that a landmass has to be to consider it to be a continent rather than an island? What is the resolution of the map you're ...
2
votes
0answers
77 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
votes
0answers
53 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
votes
0answers
134 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
votes
0answers
62 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
votes
1answer
341 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
votes
1answer
91 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
votes
2answers
97 views

How to define NumberForm in LegendLabel?

To start: ...
1
vote
1answer
87 views

Question about BorderingCounties

I start with: escambiaFL = Interpreter["USCounty"]["Escambia county"] Answer: Escambia County, Florida, United States. Next; evaluate: ...
1
vote
1answer
104 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
votes
1answer
80 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
votes
1answer
69 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
votes
1answer
357 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 ...
5
votes
1answer
83 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
199 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
votes
1answer
145 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
votes
1answer
340 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
votes
1answer
283 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
votes
1answer
67 views

Custom alignment for GeoMarkers

I need to align a GeoMarker at the bottom left of the marker: ...
3
votes
2answers
223 views

Placing markers on geographic map

I need to mark some objects in accordance with their coordinates (for example, in the form of blue point). And I found out two ways to realise it: Option 1. If I have the necessary map (called "EKB"...
1
vote
0answers
131 views

GeoGraphics unable to download data for a given ranges from the Wolfram geo server [closed]

Lately I'm having problems evaluating GeoGraphics functions in Mathematica (version 11.3). For example, when I attempt to evaluate: ...
3
votes
1answer
72 views

Improving accuracy of $GeoLocation in wolfram cloud forms

The four commands Here CloudEvaluate[Here] CloudEvaluate[FindGeoLocation[]] CloudEvaluate[$GeoLocation] all give wildly different results. None of them are ...
4
votes
0answers
72 views

Importing and and manipulating large GEOJSON files based on geographic locations

I have large GeoJson data files that I would like to import (i.e. buildings in a city, see image below for data structure) and then "cut out" only the buildings that are within approx. 100 GeoDisks (...
9
votes
1answer
176 views

GeoListPlot exact addresses

In GeoListPlot the locations are supposed to be GeoPosition or Entity objects representing ...
2
votes
0answers
41 views

How would I obtain error information on a $Failed GeoElevationData?

The following code returns an error: GeoElevationData: with no description of the error. I think this error may be because I am asking for elevation data that is ...
3
votes
2answers
152 views

How to insert short version of county names into a Geo Region Value Plot map

I have the following counties in Florida : ...
2
votes
2answers
131 views

How to make a choropleth map with a regional shapefile & data? (no global worldmap or continental)

I have a regional map in a shapefile with datanames and similar, but I can´t use it with data and making a choropleth map. I can´t use the names of each region ...
10
votes
3answers
847 views

Coloring a map of India

Below is a map of India (img). and I can visualize it in the following way: ...
9
votes
0answers
80 views

Adding a new GeoProjection?

The documentation for GeoProjectionData gives a list of supported GeoProjections. I was not able to find any documentation on ...
18
votes
1answer
645 views

Sea Level Rise - How to mask on relief plot

I want to make a diagram which corresponds to sea level rise in the UK. I'm having trouble with relief plot. So, corresponding to a 30 metre height increase of the sea, we would get the following ...
3
votes
1answer
73 views

Matching Aspect Ratios between two GeoGraphics with Entities for GeoRange

I'm making a basic 50-state map of population (using a log scale). Given the usual crucible of figuring out what to do with Hawaii and Alaska, I thought I would make the same ...
4
votes
2answers
198 views

How to extract geo location of city and plot the map

I would like to construct Turkey's map using Geocoordinate of each city. This link has all coordinate of of cities but I don't know how to extract the data from website. I did manually two cities and ...
3
votes
1answer
67 views

SetAccuracy not resulting in duplicates for GeoData like SetPrecision does

I am continuing to work with GPS data related to trail routes and am trying to optimize the code by removing route points from a GPX file that are very close to each other by setting the accuracy of ...
4
votes
2answers
115 views

How to get the input string of Entity as output?

I have the following codes:- ...

1
2 3 4 5