UTFGrid is a specification for rasterized interaction data.

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7
votes
3answers
357 views

Create interactive map with no server

I have managed to build a great web mapping application using tiles created from GeoWebCache and a custom gridset, but I now need to add an overlay to the base maps. The only interactivity I need is a ...
4
votes
2answers
721 views

How Can I make UTFGrid files?

I have been looking at the UTFGrid specification and the usage of UTFGrid in Openlayers. How do I create the required UTFGrid files for my data in PostGIS?
3
votes
1answer
55 views

Displaying large number of polygons on web map?

I've started working on a project with a huge number of polygons, and I'm unsure of how to display/host it. The map I'd like to end up with will have three layers: 1) Shaded polygons representing ...
3
votes
1answer
534 views

Calculate bounding box + buffer for rendering a map tile with mapnik library

Mapnik library has a Projection object (I'm using Python bindings): spherical_mercator = '+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0 +k=1.0 +units=m +nadgrids=@null ...
2
votes
1answer
534 views

Displaying UTFGrids with Mapnik and TileStache

I'm new to using Mapnik and TileStache. The reason i wanted to use these two pieces of software was to understand the UTFGrid specification i've seen used all over the place ( examples here, here, ...
2
votes
1answer
232 views

TileStache & UTF Grid provider is having unexpected results

I am having some weird output by the UTF grid provider in Tilestache on specific shapefiles; Specifically shapefiles reprojected from Census TIGER files. I know my server is configured correctly ...
2
votes
0answers
181 views

Tilestache/Mapnik: Is it possible to create dynamically filtered layers?

I'm using Tilestache to generate two layers with the mapnik and mapnik grid providers, and it's working great! However, I want users to be able to filter the data over many (more than ten) ...
1
vote
0answers
31 views

UTFGrid and custom tiles in OpenLayers

This is my first post here so I apologize in advance if a convention is escaping me in the question format. I am trying to display information from utfgrid in OpenLayers. I am using custom tiles in a ...
1
vote
0answers
18 views

can wms from geoserver serve as utfgrid data? [duplicate]

i'm confused on how to make interactive map displayed. i used geoserver from opengeo suite and then i use openlayers to display the map on my site. I have been able to display the attribute by using ...
0
votes
0answers
5 views

UTFGrid from raster source

Is it possible to make utfgrids from a raster source (e.g. GeoTIFF)? I am trying to get utfgrids from a .tif with mapnik.xml and TileStache but it seems not to be working. As a workaround I am ...
0
votes
0answers
29 views

Can i access UTF grids without a server?

I'm creating a slippery map that will run off of a usb stick or cd (client request). I'm able to load up the map, display pre-cooked tiles and some some simple vectors. The client would like some more ...
0
votes
0answers
89 views

Custom UTF Grid Renderer performance improvement help

Back in November I asked a question (Create interactive map with no server) and had lots of great responses all of which I tried but because my dataset was so large I wrote my own custom UTF Grid ...
0
votes
0answers
125 views

UTFgrid support in QGIS

Starting with GDAL 1.10, the MBTiles driver allows to read rasters in the MBTiles format. The driver can also retrieve pixel attributes encoded according to the UTFGrid specification available in some ...