Questions tagged [geographics]
Questions on the family of Geo* functions, e.g. GeoGraphics, GeoEntities etc.
191
questions
1
vote
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
...
0
votes
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 ...
12
votes
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
votes
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
votes
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 ...
2
votes
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.
...
1
vote
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
votes
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
votes
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,
...
1
vote
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.
...
0
votes
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
votes
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 ...
7
votes
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
votes
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
votes
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
votes
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
votes
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
votes
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 ...
2
votes
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
votes
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
votes
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
votes
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
vote
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
...
2
votes
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
votes
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 ...
0
votes
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
votes
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
votes
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 ...
0
votes
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
vote
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
votes
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
votes
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
votes
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
votes
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
votes
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
votes
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
votes
1answer
90 views
refining colors on GeoRegionValuePlot
Here is the code I am using to get an image of the entire USA.
...
2
votes
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
votes
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
votes
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
votes
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
votes
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
votes
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
votes
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
votes
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
votes
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
votes
2answers
98 views
How to plot countries with accurate area?
Are there any projections that use the true size of countries, like this?
8
votes
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,
...
1
vote
0answers
36 views
MapAT and GeoPosition
I just experienced a problem applying GeopPosition via MapAt. Here a MWE. Given a list of data:
...
3
votes
0answers
22 views
Possible bug in using ClippingStyle inside of the GeoRegionValuePlot
Using Mathematica 12.0 the following code:
...
