Stack Overflow
Stack Overflow

Questions tagged [cartography]

127 questions
1
vote
2 answers

improve cartographic visualization

I need some advice about how to improve the visualization of cartographic information. User can select different species and the webmapping app shows its geographical distribution (polygonal degree cells), each specie with a range of color (e.g…
user1249791
  • 1,241
  • 4
  • 14
  • 33
1
vote
1 answer

How to plot geo-referenced image so that it "fits" the plot coordinate system in Matplotlib

A very similar question, solved the same way: how to use 'extent' in matplotlib.pyplot.imshow I have a list of geographical coordinates (a "tracklog") that describe a geographical trajectory. Also, I have the means of obtaining an image spanning…
heltonbiker
  • 26,657
  • 28
  • 137
  • 252
1
vote
1 answer

Add coastline when plotting faceted arrays in R with ggplot2

I put together a toy example below. My question is, how can I added coastlines (much like you can get from the maps package to the faceted plots below? I can do this with contour() and filled.contour(), but I'm not sure of how to go about this with…
brews
  • 661
  • 9
  • 23
0
votes
0 answers

Is there a way to change tm_text position in R?

I know tm_text() uses centroids to locate labels, however when I try to run the code using the Shapefiles from this webpage (Instituto Dominicano de Datos Espaciales):…
almr27
  • 43
  • 4
0
votes
1 answer

Create new geographical map data or use modified maps

I am working on an iphone application that requires routing within a limited area such as parks, historical places, popular markets or remote areas in the country. Given that google maps, openstreetmaps or any other maps is not supposed to have the…
krammer
  • 2,598
  • 2
  • 25
  • 46
0
votes
0 answers

How can I start to build a new map and clean the old one in Cartographer?

I am using the cartographer_node to build the map, together with the cartographer_occupancy_grid_node to publish the occupancy grid map. Both nodes work fine. I would like to control when to begin the mapping work and when to stop. For example, the…
Blue Bird
  • 318
  • 2
  • 9
0
votes
1 answer

How to simply start mapping in R?

For the first time, I want to do mapping in R, something very basic to start with. For example, draw the map of a country and add points according to GPS coordinates that I have in a datatable. I thought it would be simple but it looks more…
Discus23
  • 471
  • 2
  • 11
0
votes
0 answers

How do I add a color layer/mask for data spatial visualisation to a map in Flutter?

So there is this project I'm working on, which is basically a map view, referencing air quality sensors. On the screenshot bellow, each marker is a sensor, and each sensor allows to have real time data about air particles coming in. an example of…
Petitsuix
  • 1
  • 1
0
votes
0 answers

How to compute a 2-D embedding from a distance matrix?

I would like to draw a map of NYC where the distances between neighborhoods are scaled by transit time. I computed a distance matrix using the Google Maps Distance Matrix API for public transit. To visualize it, I tried embedding using…
sardine
  • 13
  • 5
0
votes
0 answers

Expected hostname at index 7 for neo4j bolt (3.5.21)

We run neo4j (3.5.21) in an EC2 instance. Today, after I restarted the server, noticed this error: Expected hostname at index 7: bolt://:7687". Starting Neo4j failed: Component…
Purusottam
  • 611
  • 6
  • 19
0
votes
2 answers

Where can I find a picture of earth on which I can overlay points?

Are there any free map pictures I can use for geographical visualizations? I'm looking for something of reasonable quality I can map lat/lon points to pixels on and play around with visualization techniques. Where does one go about finding…
Dustin
  • 89,080
  • 21
  • 111
  • 133
0
votes
0 answers

Postgis/Postgresql join 3 tables

I'm a complete beginner to Postgresql and Postgis and I can't figure how to do this: I have 3 tables, T1, T2 and T3. T1 and T2 have ID as common column. T2 and T3 can be joined on the geom column. T1 and T3 can't be joined. In table 1, I have all…
Ganymede
  • 1
0
votes
1 answer

Neo4j - cartography ConnectionRefusedError?

I am getting the following error when running docker compose but when I go to bolt://localhost:7687 I do get the graph and all the labels and nodes. Dockerfile and Docker compose are attached. ERROR:neo4j:Unable to retrieve routing…
SteveS
  • 3,789
  • 5
  • 30
  • 64
0
votes
1 answer

How to set specific number of classes when using head/tails classification in R?

I want to perform head/tails classification to data.frame and I'd like to set the number of classes to 7 but I can't. The classes are set automatically to either 2 or 14. I tried different parameters like the n = 7 and thr = from 0 to 1, without…
Nikos
  • 426
  • 2
  • 10
0
votes
1 answer

Plotting image files over states in a US Map in R

Essentially, what I want to do is utilize my work's sales data to see which of our brands is selling the most in each US state - and have the brand image file in each respective state. For instance, if the best-selling brand of food we sell in Utah…
user14452102
1 2 3
…
8 9