CODEWITHSUNDEEP
google-mapsmappingmaps
carrier
carrier

Reputation: 33069

Does any map api allow you to retrieve an exact area?

I'd like a way to obtain a static map (an image file) based on two coordinates representing the desired rectangle or area.

Suggestions?

Upvotes: 1

Views: 1269

Answers (4)

MarkJ
MarkJ

Reputation: 30408

Use the OGC WMS GetMap request to get an image

This page explains how to get this image. The image is from DEMIS, but there are thousands of providers out there with WMS services

enter image description here

I do recommend DEMIS, but here are some lists of free WMS services.

Upvotes: 0

Igor Shubovych
Igor Shubovych

Reputation: 2820

http://wiki.openstreetmap.org/wiki/MapOf

However this is about OpenStreetMap

Upvotes: 0

RedBlueThing
RedBlueThing

Reputation: 42532

Yep. Google has a Static Maps API which does exactly this. It is basically just a URL with the latitude, longitude and zoom level passed as parameters (and a whole lot of other variables). You can read about it in the Google Maps API documentation.

Here is an example of what you can do:

From the URL:

http://maps.google.com/staticmap?center=40,26&zoom=1&size=150x112&maptype=satellite&key=ABQIAAAAgb5KEVTm54vkPcAkU9xOvBR30EG5jFWfUzfYJTWEkWk2p04CHxTGDNV791-cU95kOnweeZ0SsURYSA&format=jpg

Edit: As per your comment. The closest I can get to a square form 30,40 lat 60,70 lng is center 35,65 zoomlevel 6. I have created an example 400x400 image. Just change the key in the following URL to get your static map image:

http://maps.google.com/staticmap?center=35,65&zoom=6&size=400x400&key=<your key here>&format=jpg

Thanks ChrisB for pointing out the span param (I hadn't seen that before). I updated my example with the span version of the URL:

http://maps.google.com/staticmap?center=35,65&span=5,5&size=400x400&key=<your key here>&sensor=false

As you can see from the example, this generates the same zoom level as the origional URL, but provides a much easier way of getting there (rather than adjusting the zoom by hand and checking the edges).

As Chris points out the granularity of the zoom levels will can only approximate the edges of the map. If you require a closer approximation, I can only suggest adjusting the size of the static image map to try and get closer to the your boundary latitude/longitude.

Upvotes: 2

Chris B
Chris B

Reputation: 15834

If you need the map to precisely fit a particular area, it is unlikely that you'll be able to do it because most of the map API's have pre-designated zoom levels, and there probably won't be a zoom level that will allow you to perfectly fit your area.

However, if you just need to get close, the Google Static Maps API provides a method to specify a viewport, eliminating the need to set the zoom level yourself. All you need is the center point and the span. If you want the area from SW(30,70) to NE(40,60) the center would be (35,65) and the span would be (5,5).

http://maps.google.com/staticmap?center=35,65&span=5,5&size=400x400&key=MAPS_API_KEY&sensor=false

Note that you'll get different results depending on the requested image size.

Upvotes: 2

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