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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
25 views

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

Lately I'm having problems evaluating GeoGraphics functions in Mathematica (version 11.3). For example, when I attempt to evaluate: ...
3
votes
1answer
33 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 ...
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0answers
42 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
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1answer
77 views

GeoListPlot exact addresses

In GeoListPlot the locations are supposed to be GeoPosition or Entity objects representing ...
2
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0answers
18 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
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2answers
65 views

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

I have the following counties in Florida : ...
2
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2answers
57 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
807 views

Coloring a map of India

Below is a map of India (img). and I can visualize it in the following way: ...
8
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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
586 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
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1answer
46 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
135 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
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2answers
70 views

How to get the input string of Entity as output?

I have the following codes:- ...
8
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1answer
100 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
37 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
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2answers
298 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
54 views

How to remove the undesired border of the GeoGraphics?

I have created an image of Europe as below:- ...
3
votes
1answer
46 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
98 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
61 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
votes
1answer
42 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
238 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
119 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
401 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
81 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
522 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: ...
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0answers
43 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
69 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
66 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
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2answers
225 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
79 views

Is GeoElevationData[] inconsistent?

Why dose GeoElevationData[] give different results in its one and two argument forms? ...
7
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0answers
112 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 ...
1
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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
216 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
votes
1answer
430 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: ...
5
votes
5answers
440 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
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5answers
546 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
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2answers
539 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
117 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
187 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
186 views

How to find what you want in curated data?

The following gives a list of all counties in the state of Maryland. ...
1
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1answer
87 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"
4
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2answers
136 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
156 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
votes
1answer
88 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
81 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
179 views

Inserting county names on a map

I'm attempting to insert the county names on a map of Florida: ...
3
votes
0answers
86 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 ...