Questions tagged [geographics]

Questions on the family of Geo* functions, e.g. GeoGraphics, GeoEntities etc.

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1answer
45 views

Style does not work in GeoListPlot

a bug in v12.3 and v12.3.1 I'm trying to apply some styling to GeoPositions ...
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0answers
53 views

Is a point inside a graphics group composed of multiple Polygons and FilledCurves, not all overlapping?

I have many thousands of points, and I want to check if they are inside a GraphicsGroup that is composed of many Polygons and FilledCurves, similar to GeoWithin but without having to make tedious ...
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4answers
2k views

How can we find the longitude that cuts all the land on Earth in half?

Mathematica has already a specific function, RegionCentroid, that can be utilized to calculate the geographic center of any region. As it has been discussed in here ...
3
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1answer
54 views

Using Tooltip with GeoRegionValuePlot

I am using GeoRegionValuePlot to create color coded county maps of a given state. Color is determined from the value given with a rule. I would like that same value specified in the rule to be ...
12
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2answers
865 views

What fraction of a mountain parcel has slopes over 15%?

Update: The original error was not from the elevation data, but from the use of "Degree". See below. An agency interested in purchasing heavily sloped land has decided to use a criterion ...
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0answers
42 views

Unable to hide triangulation lines in GeoGraphics

The following code produces a night region that shows triangulation. I thought that EdgeForm[None] would hide it, but it does not. ...
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0answers
53 views

Plot lat/long pairs on a US state map

I have a list of lat/long coordinates. I'd like to plot them on a US state (say New York). These coordinates include locations outside New York, but I'd like to get a map of just New York with these ...
13
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1answer
1k views

Are Mathematica's maps copyright-free?

Are the maps available in Mathematica copyright-free? For instance, if I generate the image ...
0
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1answer
41 views

How to prevent small locations from being plotted as points when using GeoListPlot?

When a location is too small, GeoListPlot marks that location using a point on the map. For example, ...
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0answers
37 views

Can Google Earth images be imported?

I've searched for code and found nothing. Is this a server handshake problem? Below, GeoGraphics executes properly on wikimapia.org, but WebImage doesn't open earth.google.com to a coordinate. ...
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1answer
42 views

Changing style of lines in GeoGraphics

I have a list of coordinates and want to draw lines on a map between these coordinates. These lines may either be paths (GeoPath) or just straight lines (Line). The problem I am facing is that I want ...
3
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1answer
95 views

Manipulating GeoPlots Effectively

I've built a small interface for project because it's been a bit disorienting for me and others to quickly change the range on the plots. Eventually we'll tie different features of the data to colors ...
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2answers
505 views

Trying to Rotate the North Pole View of a Globe

My goal is to generate diagrams like this. But I would like to be able to rotate the globe about the North Pole, so that I can represent different times of the day. When I use ImageRotate, the ...
3
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1answer
61 views

I'm struggling with the new syntax and with GeoGraphics

I've used Mathematica since the mid-90's, but I'm a beginner with some of the new syntax. The thing I'm trying to do is not only have a polar map of the Northern Hemisphere, ...
4
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1answer
65 views

mapping a digraph across sectors of countries

Given a (9,9) matrix representing three countries (for example, the US, China, Russia), each one of which has three sectors (vertices/sectors {1, 2, 3) for the US; {4, 5, 6} for China; and {7,8,9} for ...
6
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1answer
280 views

GeoGraphics Day/Night way off

I've been struggling to figure out the correct GeoGraphics options to get the desired results. Here's what I have so far and the results that I'm getting: ...
5
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3answers
237 views

Text rotation in GeoGraphics

I have a problem rotating some text in GeoGraphics. Whenever I rotate the text I am also getting a shift in the latitude. OS: Linux x86 (64-bit) FullVersionNumber: 12.1.1 As a minimum working ...
3
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2answers
127 views

Creating Maps from Shape Files for “Mixed” Labeled Data

Following suggestions from an extremely useful and informative solution to a previous question regarding shape files (Extracting a single layer from a SHP file) by ssch, I have been able to create two ...
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0answers
45 views

Geographical Representation of TimeZones

I'm trying to show a geographical representation of a TimeZone on a map. On the Mathematica website, it says I can use Polygon[] and it will automatically color in that TimeZone region on a map: ...
2
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0answers
65 views

Where can you get by walking half a mile?

I recently saw that Mathematica 10 introduced really nice tools for geography. I would like to use GeoGraphics to visualize all possible paths with a length of half ...
13
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3answers
3k views

Oak Island, extending the “Alignment”, possible Great Circle?

During these days of COVID, I indulged in the guilty pleasure of watching The Curse of Oak Island - Season 8, Episode 4 Alignment, which viewed last night (1 Dec 2020). During the episode, some "...
0
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2answers
69 views

How to understand this behaviour of GeoRange and GeoGraphics [duplicate]

I've preprocessed ~100,000 points in the Vancouver area and am starting to analyze and segment them in different ways. I wanted to start off with a nice finely controllable bounded region since others ...
1
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2answers
75 views

Having trouble getting map data for the Maldive Islands

I change the island and GeoRange from the example, but it shows the error, can anyone help me with that? Follow link as the original example(The first and second pictures) : https://risu.io/SOmU ...
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0answers
27 views

Difficulty with getting local GeoPosition correctly

I am using the wolfram cloud on a Chromebook and when I type the function Here it returns a faulty ...
2
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2answers
44 views

Metro Area - Geographics

I have given the following list of European cities and I would like to have the area (surface or metropolitan, I do not care much). For example, the surface area of Paris is 105.4 km². Is there a way ...
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0answers
38 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
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1answer
95 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
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1answer
104 views

Create concentric circles with numbers inside

Hello there if you can give me a hand I want to create and export to pdf the following figure, which if you realize forms the multiplication table. The idea is to be able to control the central number ...
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1answer
45 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
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1answer
28 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
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2answers
80 views

Index of item inside StructuredArray

How do I extract position of item in StructuredArray without converting using Normal? The following code finds the position of ...
3
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1answer
66 views

Questions on GeoGraphics

I am trying to use GeoGraphics for some land navigation. In the spirit of showing my work, here is what I've done so far: ...
2
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1answer
72 views

How to use PlotRange with GeoGraphics [closed]

I am using PlotRange to clip a GeoGraphics plot so that I can center an area of interest. However, I do this via trial-and-error because I have no idea how PlotRange coordinates specified as ...
2
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1answer
82 views

How do I handle Cities in the analysis of covid-19 data?

For this map I am trying to find a way to have some kind of GeoRegionValuePlot and I just want only the biggest cities, not every town. The shade of each city on the map will give the number of covid-...
2
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1answer
50 views

How do I use the Manipulate-function with GeoGraphics? [closed]

I'm trying to use the Manipulate function with GeoGraphics like so: ...
2
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1answer
166 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)...
2
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1answer
90 views

refining colors on GeoRegionValuePlot

Here is the code I am using to get an image of the entire USA. ...
2
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0answers
61 views

Difficultly importing GeoTiff format

I downloaded Earth data from here. It is a GeoTiff file, which is a map of solar radiation falling on earth. Mathematica claims to import ...
4
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0answers
44 views

GeoListPlot - How can I create edges between points on a GeoGraphic object by clicking on them?

I'm attempting to use Mathematica to manually create a graph from a set of GPS coordinates (vertices). This graph will define the paths an autonomous rover will travel along. Here's what I have so far ...
7
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2answers
489 views

2D and 3D graphics that project a world map on Icosahedron

I would like to generate 2D and 3D graphics of icosahedron with continuous world map projected on them. An example is provided as follows: It's trivial to generate 3D Icosahedron using ...
3
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1answer
43 views

How to store the GeoRegionValuePlot tiles in a .mx file?

I have a huge association of counties associated with some values. I am creating a GeoRegionValuePlot for this data. But every time I execute this the code in a fresh kernel, it always downloads the ...
3
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0answers
44 views

Can I point to Wolfram's geoserver from outside Mathematica?

Sadly, I'm having to port my Mathematica code. I'd like to use the same (or very similar) GeoGraphics default map background as my Mathematica code does. Can I somehow point to and use Wolfram's ...
0
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0answers
70 views

How is the default bar legend of GeoRegionValuePlot defined?

I want to modify the default bar legend of GeoRegionValuePlot but I can't find any documentation on how it is defined. Is it possible to get the default legend from ...
0
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1answer
70 views

Labeling cities with GeoGraphics

I have the picture below and I am struggling to put the respective labels on the three cities (namely Shenzhen, Dongying and Zhangye) from which the colored edges come out. I am using this code ''...
5
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1answer
87 views

Improving GeoGraphics rendering

I am trying to implement a dummy example of supply chain network design. In particular, some cities are warehouses and others are customers. I want to show the cities on the map, highlight graphically ...
2
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2answers
86 views

How to remove gridlines in a GeoBubbleChart

Assume that LargeRegionalCities is a list of, say, US cities. I would like to remove the gridlines in the code below: ...
4
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2answers
98 views

How to plot countries with accurate area?

Are there any projections that use the true size of countries, like this?
8
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3answers
293 views

GeoBubbleChart Colors

I'm struggling to find a way to change the default background color of a state, say the Netherlands, when using GeoBubbleChart. When using GeoGraphics this is pretty easy. For example, ...
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0answers
36 views

MapAT and GeoPosition

I just experienced a problem applying GeopPosition via MapAt. Here a MWE. Given a list of data: ...
3
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0answers
22 views

Possible bug in using ClippingStyle inside of the GeoRegionValuePlot

Using Mathematica 12.0 the following code: ...