0
votes
0answers
13 views

How to ensure that Tilemill interprets my postgis query as intended?

One of my layers (a postgis query from my local osm2pgsql database) is being translated incorrectly in Tilemill. The query is attempting to select the way, the area of the polygon, and the sport=* ...
1
vote
0answers
15 views

How to set tolerance value of ST_Intersects query in TileMill?

I want to place river names in Tilemill. I use "text-dy" to displace label from the center line of a river. But for labeling polygonal rivers, names extracted from lines are used too. So at a small ...
1
vote
0answers
27 views

How to define Z dimension on table with PostGIS for import in TileMill?

I'm trying to reproduce the idea behind this blogpost from Mapbox, but with other data, for example the ne_10m_populated_places_simple dataset from Natural Earth. By adding a z-dimension to the data ...
2
votes
2answers
52 views

Export to Mapbox (TileMill) from PSD (or SVG/PNG)

Newbie question: I designed a map (not Earth-related) in Photoshop and I want to use something like Mapbox to serve the map and make it dynamic (bounding boxes, zoom in/out, etc). How can I go from an ...
10
votes
1answer
419 views

GUI tools for PostgreSQL/PostGIS?

as a cartographer I work with TileMill to visualize geodata. I installed a local PostgreSQL server with PostGIS and osm2pgsql. Everything works fine. Anyhow, I am new to working with servers and the ...
2
votes
0answers
143 views

Styling river charts with TileMill - issue with filling a polygon made of disjoint line segments

I am trying to style inland river charts produced by the Army Corps of Engineers. I imported the vectors into Postgres, and I’m using TileMill to style the data. I am having trouble correctly filling ...
2
votes
0answers
190 views

Smooth, not simplify, lines features in PostGIS

I'm trying to automatically generate paths to place labels on that follow the shape of rivers, 4wd tracks and other very windy lines. At first I thought the st_simplify() function was the answer, but ...
2
votes
0answers
84 views

Find and destroy duplicate OSM multipolygon/polygons in TileMill/PostGIS

In OpenStreetMap there are sometimes multipolygons where attributes are present on both the polygon and the multipolygon relation, such as the Grampians National Park: ...
1
vote
1answer
231 views

How to render GPX files in TileMill?

I want to show a number of GPX files in a TileMill map. Here's the process that I thought would work: gpsbabel -i gpx -f "$myfile" -o kml,lines=1 -F "$myfile.kml" Add as layer in Tilemill, style ...
0
votes
1answer
89 views

How to visualise “distance from amenities”?

I'm interested in calculating for every point the distance to the nearest amenity of each of a certain number of types (train station, supermarket and so on). I think the calculation will be ...
0
votes
1answer
116 views

Automatic four-colour (political boundary) rendering with PostGIS

This is probably a long shot, but is there a way to automatically select colours for neighbouring regions using the four colour theorem, in PostGIS? The data I'm using is suburb boundaries in ...
1
vote
1answer
197 views

Incorrectly Projected PostGIS data in TileMill

When I bring PostGIS data in EPSG:900913 into TileMill, my layers end up on other continents. This is my workflow: (1) Save shapefiles in QGIS to EPSG:900913 (2) Import the shapefiles using PostGIS ...
2
votes
1answer
425 views

How to get the coastline from OSM?

I've successfully imported all data for Sweden to my PostGIS database. Right now I'm designing my map in Tilemill with OSM Bright as base. But I've got a major problem: where is the coastline? Right ...
0
votes
1answer
218 views

How do I fix out of bounds geometric extent error?

I'm new to GIS, and I'm roughly following the instructions here: http://mapbox.com/tilemill/docs/guides/postgis-work/ to try and import data I obtained from here: ...
3
votes
2answers
298 views

small difference in projection between tilemill and postgis

I would like to create a world map with interaction on continents created directly from a postgis database. For the moment, I have a POSTgis database with the data. I created a background with ...
3
votes
1answer
371 views

making choropleth maps using PostGIS Windows

i read an article on chicago tribune blog about making maps, it consist on "making choropleth maps using PostGIS, TileMill, Mapnik and Google Maps" on Mac environnement, my question is how we can ...