[Talk-us] High resolution off-leaf imagery of Virginia (VBMP)

Josh Doe josh at joshdoe.com
Tue Mar 1 13:46:29 GMT 2011


True, it is straightforward to get the tiles, and the specification is
open [1]. The trouble lies with reprojecting the tiles, or informing
the editor of the projection. Easiest way may be to write an extension
to MapProxy/TileCache/etc so we can just use plain old TMS or WMS.
Hopefully VGIN will directly offer this kind of service at some point.
-Josh

[1]: http://resources.esri.com/help/9.3/arcgisserver/apis/rest/index.html

On Tue, Mar 1, 2011 at 8:40 AM, McGuire, Matthew
<Matt.McGuire at metc.state.mn.us> wrote:
> It is just jpegs over http.
>
>
> -----Original Message-----
> From: David Fawcett [mailto:david.fawcett at gmail.com]
> Sent: Monday, February 28, 2011 1:20 PM
> To: Josh Doe
> Cc: OSM US Talk List
> Subject: Re: [Talk-us] High resolution off-leaf imagery of Virginia (VBMP)
>
> You have to love open, public domain data only published in
> proprietary formats...
>
> On Mon, Feb 28, 2011 at 11:18 AM, Josh Doe <josh at joshdoe.com> wrote:
>> I'm not sure how many are aware of this, but the Commonwealth of
>> Virginia regularly acquires high resolution orthoimagery, through the
>> Virginia Base Mapping Program, administered by the Virginia
>> Information Technologies Agency (VITA). Some of this data is in the
>> public domain. Specifically, the flights from 2002 and from 2006/2007
>> are available online [1], and Google even uses some of this imagery
>> for certain parts of Virginia (though not in my area). The imagery
>> from 2006/2007 varies in resolution from 6 inches to 1 foot.
>>
>> Unfortunately this data is only available via an ArcGIS Server, using
>> their REST interface. I made an attempt to write a plugin to support
>> that interface in JOSM but was unsuccessful, however through some
>> trickery I was able to create a local OSM-style tile cache of my small
>> area of interest, and have found it very useful due to the high
>> resolution and especially because I can see right through the trees,
>> since it's off-leaf.
>>
>> It's expected that later this year VBMP imagery from 2009 is to be
>> released into the public domain. This imagery varies in resolution
>> between 3 inches and 1 foot. VITA is testing a WMS server, but there
>> are no guarantees it will become available.
>>
>> If anyone is interested in adapting JOSM and/or Potlatch2 to support
>> the ArcGIS REST tile interface, please let me, as I'd be interested in
>> collaborating.
>>
>> It would be fantastic for Virginia OSMers to have access to this data,
>> especially when the 2009 imagery becomes available!
>>
>> Regards,
>> -Josh
>>
>> [1]: http://wiki.openstreetmap.org/wiki/Virginia#Virginia_Base_Mapping_Program_.28VBMP.29_Orthoimagery
>>
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>
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