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46
votes
21answers
53k views

Are there any free administrative boundaries available as shapefiles?

After learning about the US Census's TIGERLines datasets I'm addicted to GIS :) I've working with the following layers, from the USA data Country boundaries State boundaries County boundaries City ...
10
votes
12answers
1k views

canvec: why so quiet? where are all the users?

It has now been a little over 3 years since Natural Resources Canada released CanVec, a national coast to coast to coast spatial dataset at 1:50,000 or better nominal scale. In the interverning time ...
6
votes
1answer
230 views

What is the best way to store Flickr's Shapefiles Public Dataset in SQL Server 2008?

I'm wanting to import specific locations from the Flickr Shapefile Dataset into SQL Server would like to know what is the best way to store the data in SQL Server 2008? Link the the 1.0 Dataset: ...
15
votes
4answers
3k views

Simplifying adjacent polygons

I encountered a problem simplifying set of polygons that are adjacent. If I simplify each polygon separately with the Douglas–Peucker algorithm (which is used by many open source tools), the resulting ...
4
votes
1answer
330 views

Can someone explain in simple terms the licence on Google “satellite” images?

What can I and can I not do with the Google satellite images?
3
votes
3answers
185 views

What are the licence limitations on the free Ordnance Survey (OS) data sets?

The OS has some “free” map data, but what am I allowed to use it for?
4
votes
4answers
270 views

Are there any other providers of map data in the UK apart from the Ordnance Survey?

The Ordnance Survey charges a lot for most data, so what are the other options?
4
votes
4answers
321 views

In the UK, how do I convert from an address to a lat/long?

Please include where I can buy the dataset and how much it costs?
5
votes
5answers
362 views

What is the best way to protect data online?

What techniques do people use when protecting data (e.g., preventing a user downloading the whole dataset) they are overlaying on top of Google/Yahoo/Bing etc.?
15
votes
8answers
455 views

Are there sources for more esoteric data than streets worldwide?

Related to this question. For example, things like: political world map (as polygons) cities of the world geolocated climate data (avg temp, humidity, rain, as polygons), earthquakes, hurricanes ...
14
votes
8answers
18k views

Where can I find Canadian postal code geometries?

Where can I find the shapefiles for Canadian postal codes?
17
votes
3answers
843 views

Where to get street data in an importable format?

I don't want to use WMS layers, but to actually store the data in my local server, where can I find street data from the world?
8
votes
2answers
3k views

Ordnance Survey grids - download or generate?

Does anyone know a source from which to download vector UK Ordnance Survey grids at varying resolutions? Or failing that, a tool that can create an OS grid at a specified resolution? There are plenty ...
5
votes
3answers
395 views

Where can I get data for traffic signals, stop signs, and other sign assets/inventory?

I'm working on a project involving roads. The quality of the service would benefit from knowing if a given road is continuous or if it's broken up by stop signs, traffic signals, and other things ...