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.
233
questions
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1answer
45 views
2
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1answer
138 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
75 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
18 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
52 views
EntityClass Downloading Speedup
Running this command. Trying to get all cities more than 1 million people in US.
...
4
votes
2answers
83 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
99 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
61 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
73 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:
...
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0answers
46 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
123 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
60 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
333 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}]
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4
votes
1answer
84 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:
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2
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2answers
93 views
1
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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
103 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
77 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
68 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
161 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
138 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
337 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
264 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
61 views
3
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2answers
208 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
117 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
70 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
64 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
159 views
GeoListPlot exact addresses
In GeoListPlot the locations are supposed to be GeoPosition or Entity objects representing ...
2
votes
0answers
32 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
143 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
125 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
846 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
643 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
69 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
189 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
64 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
111 views
8
votes
1answer
117 views
How to make GeoListPlot rectangular?
I have a GeoListPlot as below:-
gr = {{20, 70}, {-30, 30}};
GeoListPlot[Entity["City", {"Paris", "IleDeFrance", "France"}], GeoRange -> gr]
As you can see, ...
3
votes
1answer
54 views
How to get the coordinates of the 4 vertexes of a GeoListPlot?
I have a GeoListPlot as below. How can I get the latitude/longitude coordinates of the 4 vertexes of the GeoListPlot? I need the ...
7
votes
2answers
739 views
Find distance along a path (GPS coordinates)
I have an imported version of a GPX file plotting the route of a trail. I also have a list of coordinates for waypoints along the route. I am trying to calculate how far along the route each ...
5
votes
1answer
74 views
How to remove the undesired border of the GeoGraphics?
I have created an image of Europe as below:-
...
3
votes
1answer
61 views
How to assess GeoZoomLevel for GeoElevationData
I'd like to fetch at most 10 000 points from GeoElevationData, regardless of the location's specification.
From my experience it usually fetches ~100-400k points ...
4
votes
1answer
150 views
How to use GeoStyling[“OutlineMap”] as GeoBackground for GeoHistogram?
Say I have some location data.
SeedRandom[123]
locs = GeoPosition[
Reverse[RandomPoint[Rectangle[{-88.6273, 29.6616}, {-84.2036, 32.7994}], 400], 2]]
I want to ...
3
votes
1answer
98 views
How to draw city level bins in GeoHistogram
In GeoHistogram I can specify country or province bins but how do I specify a city bin?
...
3
votes
1answer
72 views
How to just get the elevation data of Berlin by GeoElevationData
I can plot the elevation data by this code
...
