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.
221
questions
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54 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
66 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
40 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
117 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
57 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
317 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
80 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
92 views
1
vote
1answer
85 views
Question about BorderingCounties
I start with:
escambiaFL = Interpreter["USCounty"]["Escambia county"]
Answer: Escambia County, Florida, United States.
Next; evaluate:
...
1
vote
1answer
95 views
How to build a structured data table
I'm going straight to the task; I start with the following list of Florida counties:
...
1
vote
1answer
71 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
65 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
345 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 ...
0
votes
0answers
32 views
How to show the name and data in a customized map?, with GeoRegionValuePlot
How to show the name of each division and data/values (even customizing the TextStyle for adapt to different sizes) ?. Show all the data, not only when the mouse is over on a region.
Or how to add ...
5
votes
1answer
65 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,...
2
votes
1answer
97 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
121 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
317 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
249 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
60 views
3
votes
2answers
183 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
93 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
57 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
52 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
134 views
GeoListPlot exact addresses
In GeoListPlot the locations are supposed to be GeoPosition or Entity objects representing ...
2
votes
0answers
28 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
124 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
102 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
840 views
Coloring a map of India
Below is a map of India (img).
and I can visualize it in the following way:
...
8
votes
0answers
75 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
632 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
64 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
171 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 ...
4
votes
2answers
102 views
8
votes
1answer
114 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
52 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
627 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
70 views
How to remove the undesired border of the GeoGraphics?
I have created an image of Europe as below:-
...
3
votes
1answer
57 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
141 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 ...
2
votes
1answer
84 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
70 views
How to just get the elevation data of Berlin by GeoElevationData
I can plot the elevation data by this code
...
4
votes
1answer
55 views
Unable to convert degree to number in LatitudeLongitude and “City” Entity
I am trying to convert degree to number for some mathematical transformation. Taking London as an example, the following codes can convert the degree into a number without any problems:
Codes that ...
7
votes
2answers
279 views
Map of Ancient Rome
I managed to generate a map of the Italic Peninsula with the borders corresponding to 250BC. Is there a way I can shade the area of the Roman empire of the time?
...
2
votes
3answers
163 views
Find the average GDP of multiple countries at once
How would I find the average GDP of a list of countries between set years?
I know how to do it for one but I'm not sure about multiple values. I also wish to find the average population size.
An ...
9
votes
2answers
439 views
Lexical similarity graph
How to I make a weighted nodal graph of the all the countries in Europe and the language similarity between them.
I know the LexicalSimilarity gives the similarity of specific languages, but how ...
2
votes
1answer
99 views
Quantifying Country Proximity and Shared Borders
I'm trying to find a code that can quantify the proximity of countries in Europe, taking into account shared borders and I am completely stumped.
So ideally, countries that share a border have a high ...
10
votes
2answers
601 views
Cluster graph of bordered countries?
I'm looking for a way to create a nodal graph of clusters of countries that border each other.
I have the code for finding the bordering countries of, say, Germany:
...
0
votes
0answers
64 views
GeoTiff data import problem, bug?
I imported land cover classes from a GeoTiff file created in QGIS, where the classes are coded by discrete values (NLCD nomenclature). But it seemed the import function mirrors the values (maybe a bug)...
0
votes
1answer
80 views
Hurricane Graphics: Help with Coloring a Graph
So currently I have a graph of latitude, longitude, and Max Rainfall generated from the code below.
...
