[gpl_list] Aerial Photo web services

[SMITH Cy * EISPD GEO]

I'm not sure what the problem is with what Dorothy illustrates below,
but I'll find out.  The 2009 web service that Erik has made available
via Imagery Explorer works quite well.  I just checked and could zoom
much further than what is illustrated below, in either example, with
little or no degradation of the image.  There's no problem with the
imagery that would cause such degradation.  Must be something else.

 

cy

 

Cy Smith, Oregon State GIO

DAS/EISPD Geospatial Enterprise Office

President, Urban/Regional Info Sys Assoc. (URISA)

Secretary, Coalition of Geospatial Organizations (COGO)

Past President, Natl. States Geographic Info. Council (NSGIC)

503-378-6066          http://gis.oregon.gov 

 

From: gpl_list-bounces at listsmart.osl.state.or.us
[mailto:gpl_list-bounces at listsmart.osl.state.or.us] On Behalf Of Dorothy
Mortenson
Sent: Wednesday, July 20, 2011 8:25 AM
To: Ken Smith; ENDRULAT Erik * EISPD GEO; Matthieu Denuelle;
tchaddad at gmail.com; gpl_list at listsmart.osl.state.or.us
Subject: [gpl_list] Aerial Photo web services

 

FYI:

 

Here are some examples of being able to zoom in with the aerial photos.
It would be wonderful if the ESRI service would allow one or two more
zoom levels in the rural areas. If there are any other web services I
should be aware of (using projection 102100), please let me know.

Dorothy 

 

ESRI image service: 

http://services.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapS
erver

In urban areas, we can zoom in closer. In rural areas, we cannot zoom to
the same scale as urban areas.

Roughly:

1.2" = 100 ft in urban areas

1.5" = 500 ft in rural areas

 

This is the esri web service as far as it can zoom in a rural area (near
La Grande):

 

 

 

For GEO, we can zoom to whatever scale we need, but the quality is very
poor.

http://navigator.state.or.us/ArcGIS/rest/services/BaseMaps/BaseMap_Image
ry2009_WM/MapServe

 

This is the same area and zoom using the GEO 2009 imagery (in projection
102100). It's not even recognizable.

 

 

 

------------------------------------------------------------------------
--------

Dorothy Mortenson

Oregon Water Resources Department

(503)986-0857

 

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