G-Maps API for historic satellite images?

[Adam Taranyo]

I've got a set of polygons representing rural locations which have become urbanized over the last 10 years. I'm trying to set up a web app which will toggle across available satellite image layers for a polygon over sequential years and display the year corresponding to the imagery.

1) Does Google keep old satellite imagery once new data becomes available?

2) Is the creation date/year of a satellite image saved by google as meta data? 

3) Does the g-maps API allow you to define the source map that is displayed? 

4) If yes, can this be done conditionally (i.e. use earliest map in range 2001-2006), or can you query what image dates are available for a given grid location?

Cheers,

Adam

[Barry Hunter]

1. Yes 2. Yes 3. No 4. No

Currently google only expose their historical imagery database in Google Earth.

Maybe you could make you data as KML - that would contain the ideal date for each layer. I believe there is even support for historical data in the Plugin so could use the Google Earth API

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[geoco...@gmail.com]

On Apr 16, 1:46 am, Adam Taranyo <adam.p.tara...@gmail.com> wrote:
> I've got a set of polygons representing rural locations which have
> become urbanized over the last 10 years. I'm trying to set up a web
> app which will toggle across available satellite image layers for a
> polygon over sequential years and display the year corresponding to
> the imagery.
>
> 1) Does Google keep old satellite imagery once new data becomes
> available?

No.

>
> 2) Is the creation date/year of a satellite image saved by google
> as meta data?

No.

>
> 3) Does the g-maps API allow you to define the source map that is
> displayed?

Yes. See "custom map types":
http://code.google.com/apis/maps/documentation/javascript/maptypes.html#CustomMapTypes

>
> 4) If yes, can this be done conditionally (i.e. use earliest map in
> range 2001-2006), or can you query what image dates are available
> for a given grid location?

You have to use your own map data, so you have to implement that part.

-- Larry

>
> Cheers,
>
> Adam