[gpl_list] ELA - map services

Mon Nov 1 09:44:41 PDT 2010

As far as I know, Esri's subscription-based maps
(http://www.esri.com/software/arcgis/arcgisonline/subscription-based.htm
l and
http://resources.arcgis.com/content/esri-streetmap-premium/2010/about)
don't include larger scales; instead they are targeted at commercial
users and, for the Streetmap Premium service - apparently included
premium data from teleatlas. 

The State of Oregon is participating in the ArcGIS Online Community Maps
Program
(http://www.esri.com/software/arcgis/arcgisonline/community-maps.html),
which provides a mechanism to provide content that we want to see on the
basemaps hosted by Esri. At this point, the 'community maps' program
includes the World Imagery, World Street, and World Topographic maps. 

The taxlot boundaries (just geometry, no attributes) seem to be one
dataset that would make sense to include in these community maps. Others
include current state park boundaries, best available transportation
data. If the current scale levels don't work (i.e., large scales aren't
available), we can either push Esri to provide these, or host them
ourselves at GEO.

Look forward to discussing this more; may be a good agenda item for the
next GPL meeting.

Erik

Erik Endrulat, GISP | GIS Analyst, Web Administrator
DAS GEO | 503-378-2781

-----Original Message-----
From: gpl_list-bounces at listsmart.osl.state.or.us
[mailto:gpl_list-bounces at listsmart.osl.state.or.us] On Behalf Of Brady
Callahan
Sent: Monday, November 01, 2010 9:11 AM
To: gpl_list at listsmart.osl.state.or.us
Subject: Re: [gpl_list] ELA - map services

My apologies, I've been informed that the Link to the ESRI Resource page
that I provided below doesn't work. Here is the main page for the ESRI
generated Basemaps:
http://help.arcgis.com/en/arcgisonline/agolbasemaps.html 

The "World Street Map" is the one that contains the Taxlot boundaries. 

~Brady

Brady Callahan, GISP
GIS Program Leader
Oregon Parks & Recreation
725 Summer St NE, Ste C
Salem, OR 97301
brady.callahan at state.or.us

ph. 503-986-0783
fax. 503-986-0792

>>> "Brady Callahan" <brady.callahan at state.or.us> 11/1/2010 8:48 AM >>>
Hi all,

I think Dorothy has a great point here about making use of Map Services
to ease the burden of data management and cartography for our GIS
desktop and Web based apps. 

I did some quick testing of the ESRI World_Street_Map Service (the one
with the taxlot layers in it). Here is the ESRI Resource page for it:
http://www.arcgis.com/home/item.html?id=3b93337983e9436f8db950e38a8629af

In my testing within ArcMap I found the taxlot layer to 'come on' at
1:27000 when using the State Standard Oregon Lambert coordinate system.
And interestingly enough I also found this service to work just fine in
my web application and show taxlot boundaries at the same scale range or
larger. However, the caveat to this is that the higher level of detail
for the entire service was only available in the more urban areas, the
rural areas had less detail available so at the highest level of 'zoom'
what you are actually seeing in ArcMap is a less detailed map Tile from
a smaller scale or if using a Web app you get a "Map Data Not Yet
Available" tile. 

So, I think this is good news in that we won't necessarily have to try
and negotiate with ESRI for a fee based service as it appears to already
be free. Figuring out some tricks to call a lower res tile from the map
service when needed will probably take some fancy footwork from smart
folks like Dorothy though...

~Brady

Brady Callahan, GISP
GIS Program Leader
Oregon Parks & Recreation
725 Summer St NE, Ste C
Salem, OR 97301
brady.callahan at state.or.us 

ph. 503-986-0783
fax. 503-986-0792

>>> Dorothy Mortenson <mortendc at wrd.state.or.us> 10/29/2010 8:18 AM >>>
Happy Halloween!

I don't know if many of you have tried the "Add Basemap" maps from ESRI
in ArcMap version 10. They are very nice basemaps ready to go. In
particular, check out "Streets" and zoom to an area you are familiar
with to about 1:7000. You should see a really nice base street map with
a faint outline of taxlots. Don't have a favorite area? Pick somewhere
around Stayton - you'll see the map has the updates for the new overpass
that was recently finished. (Unfamiliar? Hit the little arrow right of
the "Plus" button; Select "Add Basemap..."; Select "Streets" You must
have version 10.)

I see great potential with this base map in making web applications so
much simplier to make and easy to maintain.

However, if I were to use this map service for my web application (not
using ArcMap), I would not be able to zoom in quite as close and I would
not be able to see the taxlot outline.  It is my understanding we would
need to pay for this level of zoom. The "free" level of zoom is just
about one or two scales too small (too general).

I am hoping that GPL could possibly negotiate in the ELA that the State
of Oregon could have access to these map services at these more
zoomed-in scales for web mapping development. Could GPL add this to the
list?

Thank you for your considerations.
Dorothy

------------------------------------------------------------------------
--------
Dorothy Mortenson
Oregon Water Resources Department
(503)986-0857

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