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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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0answers
22 views
2
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2answers
52 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
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3answers
800 views

Coloring a map of India

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

Adding a new GeoProjection?

The documentation for GeoProjectionData gives a list of supported GeoProjections. I was not able to find any documentation on ...
16
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1answer
579 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
44 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
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2answers
64 views

How to get the input string of Entity as output?

I have the following codes:- ...
8
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1answer
95 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
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1answer
34 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
244 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
51 views

How to remove the undesired border of the GeoGraphics?

I have created an image of Europe as below:- ...
3
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1answer
44 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
93 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
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1answer
59 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
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1answer
57 views

How to just get the elevation data of Berlin by GeoElevationData

I can plot the elevation data by this code ...
3
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1answer
41 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
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2answers
231 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
102 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
391 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
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1answer
75 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
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2answers
511 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
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0answers
56 views

GeoDistance gives the same distances over a Table of different locations

I am generating a table of: From latitude, longitude pairs. To latitude, longitude pairs. GeoDistance between the from and to locations. The code I am using is below: ...
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0answers
34 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
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1answer
67 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. ...
0
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1answer
62 views

Trying to plot points of rainfall during Harvey on a map of Texas and color code points

I am trying to plot lat, lon, and maximum rainfall of hurricane Harvey on a Map of texas. I have gathered all the data inside Mathematica using station names and the WeatherData function. This is the ...
2
votes
2answers
216 views

Preparing weather data tabulated by latitude-longitude for plotting

I am currently working on a project where I am trying to plot latitude, longitude, and maximum rainfall of hurricane Harvey on a 3D plot. I have gathered all the data inside Mathematica using station ...
3
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1answer
78 views

Is GeoElevationData[] inconsistent?

Why dose GeoElevationData[] give different results in its one and two argument forms? ...
7
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0answers
104 views

Mistake in Mathematica administrative division data in Africa

I would like to, firstly, report that, I think there are a number of mistakes in the administrative level data. Or, at least, it is not clear to me why there should be differences in some definitions ...
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0answers
39 views

How can I import a GIS dataset in arcGRID format?

A dataset on global aridity is published here http://www.cgiar-csi.org/data/global-aridity-and-pet-database. It's a global raster on a 10 arcsecond, so fine grained, finer than I need. Mathematica's ...
6
votes
1answer
214 views

How can I get the country name when I put the mouse on the map?

How can I get the country name when I put the mouse on the map? CountryData["World", {"Shape", {"Equirectangular", {0, 180}}}]
8
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1answer
421 views

Outline of a country as a polygon

I'd like to obtain a country map of France, as polygon xy positions so I can adjust the borders. Currently I'm using: ...
4
votes
5answers
372 views

Help converting geohash string to latitude, longitude?

I'm having difficulty converting a geohash string to latitude and longitude with Mathematica and wondered if I'm missing a built in function that already has the functionality available? (I'm still ...
5
votes
5answers
536 views

How to plot the 3D-boundary of California or other states

I can get the postion with this code ...
19
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4answers
2k views

Geolocate multiple IP addresses

I would like to geolocate a few hundred IP addresses (as part of analysing server logs). What is the best way to do this using Mathematica? Does Mathematica have any builtin functionality for this? ...
6
votes
2answers
534 views

How to obtain the distance (in Km/Miles and in minutes) by road ?. for example using googlemaps

How to obtain the distance between 2 geographical points (knowing the latitute and longitude) One easy way in the web is https://www.google.es/maps/dir/42.6897189,-8.4912382/42.\ 8659508,-8.6709907/@...
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0answers
107 views

Geodesics on a sphere [duplicate]

I need to draw many geodesics on a sphere. Is it better to follow @jose in his instructive response to the post, Plot a partition of the sphere given vertices of polygons, using ...
4
votes
3answers
180 views

Generate the complement of the Earth's land mass polygons

I would like to get polygon covering of all water area of earth. I though of doing by inverting Polygon[EntityClass["Country", "LandMasses"]] How do i invert ...
10
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2answers
182 views

How to find what you want in curated data?

The following gives a list of all counties in the state of Maryland. ...
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1answer
86 views

How can I list the capital cities ending with video?

I am interested to list all the cities of earth which end with the string "video", like "Montevideo"
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2answers
135 views

Use Wolfram curated databases to determine how many randomly chosen people are needed to have a 50% chance two live in the same or adjacent states?

Background: This question is based on one asked on the statistics stack exchange, CrossValidated.SE here. Alas, the full answer to the statistical question seems to require enormous computational ...
5
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2answers
152 views

RegionMember with geographical data

I'm trying to be able to calculate whether a coordinate is within a census tract. As an example, here's a particular census tract in Chicago defined as a set of polygon vertices: ...
2
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1answer
87 views

A solution to the Four-Color Theorem applied to the map Florida, USA

After struggling for a while with the problem of finding a solution to the Four-Color Theorem applied to the map Florida, USA: List of neighbor counties for all counties in a State Neighboring ...
3
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0answers
80 views

create geolabels with date-objects

I want to create a GeoGraphics with customised labels. The example dataset is: ...
10
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1answer
175 views

Inserting county names on a map

I'm attempting to insert the county names on a map of Florida: ...
3
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0answers
85 views

Applying the Four-color Theorem to the map of Florida [duplicate]

I'm still wrestling with the following problem; I' m attempting to apply the Four Color Theorem to the map of Florida; USA. The attribute "BorderingCounties" doesn't work for Alachua County (but, it ...
3
votes
0answers
88 views

Getting data for solar radiation

There data for it is available in the web like on pvgis or NASA. The first one deliveres data for a surface with polar and azimut angle. That would be the kind of data I need. Is there a chance to get ...
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0answers
73 views
6
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1answer
126 views

List of neighbor counties for all counties in a State

If I want to find a list of neighboring countries for a particular list of countries I can do : ...
0
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0answers
70 views

GeoListPlot[GeoPosition[…]] syntax problem

I am simply trying to plot the above position, but always got error message: GeoListPlot[GeoPosition[{40.6643,-73.9385}]] LatitudeLongitude::invloc: ...
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0answers
76 views

I want to plot an intersection point from 2 street names on a map

Say, I want to plot the point of 5th ave & E 79th ave in NYC on a map, how should I do it with mathematica? Also, say I have a street, say 5th ave in NYC, can I ask to give me all the ...