[OKGIS] Oklahoma County .shp File Projected in Miles

Tue Aug 15 15:29:07 CDT 2006

To update this information.

  The "re-projection" they are looking for is GCS_NAD83. There are no miles
applied anywhere in the projection. However when they sent a sample shp that
had no prj file (GCS_Assumed) it aligned correctly with Geographic North
American 83. The vendor has an apparently fairly popular mapping interface
for selecting areas for the new reverse 911 or telephone notification
system. We have it all worked out and hopefully they will change their
documentation and even possible navigate to the virtual campus module
entitled "understanding projections" link I sent.

Hope this helps the next guy.

Brad

  _____  

From: okgis-bounces at gis.gis.ou.edu [mailto:okgis-bounces at gis.gis.ou.edu] On
Behalf Of dlowther at coordinatesolutions.com
Sent: Monday, August 07, 2006 12:39 PM
To: 'Oklahoma GIS Community'
Subject: RE: [OKGIS] Oklahoma County .shp File Projected in Miles

Thanks Brad. And I think you nailed it ("it" being the vendor's lack of
helpfulness) with "what they should do to change their software." Pushing
this sort of thing back on the client is lame.

David Lowther

  _____  

From: okgis-bounces at gis.gis.ou.edu [mailto:okgis-bounces at gis.gis.ou.edu] On
Behalf Of Brad Nesom
Sent: Monday, August 07, 2006 11:35 AM
To: 'Oklahoma GIS Community'
Subject: RE: [OKGIS] Oklahoma County .shp File Projected in Miles

Hey David,

 I have some experience with AO vendors that really just recently added GIS
functionality to a niche product and don't have a real grasp of the
implications of changing the units of standard projections. Being that
Nichols Hills is an ACOG member agency, and that my new position is to
assist with GIS data for these members. I just thought I would offer to "GIS
talk" with the vendor to get a clear understanding of what they need and
what they should do to change their software. And as I now understand. We
have several member agencies who have this same software and most of those
will be using the same dataset (albeit different areas) to accomplish this
callback selection. 

You are correct. However, it is an education issue not a technical issue.

Brad

  _____  

From: okgis-bounces at gis.gis.ou.edu [mailto:okgis-bounces at gis.gis.ou.edu] On
Behalf Of dlowther at coordinatesolutions.com
Sent: Monday, August 07, 2006 11:01 AM
To: 'Oklahoma GIS Community'
Subject: RE: [OKGIS] Oklahoma County .shp File Projected in Miles

Brad,

Can you educate us? I've not ever heard of this - as per my response.

David Lowther

  _____  

From: okgis-bounces at gis.gis.ou.edu [mailto:okgis-bounces at gis.gis.ou.edu] On
Behalf Of Brad Nesom
Sent: Monday, August 07, 2006 10:57 AM
To: 'Oklahoma GIS Community'
Subject: RE: [OKGIS] Oklahoma County .shp File Projected in Miles

Neil,

This is a fairly easy operation. I will take this offline and see if I can
help.

Brad

  _____  

From: okgis-bounces at gis.gis.ou.edu [mailto:okgis-bounces at gis.gis.ou.edu] On
Behalf Of Neil A. Gray
Sent: Monday, August 07, 2006 10:39 AM
To: okgis at gis.gis.ou.edu
Subject: [OKGIS] Oklahoma County .shp File Projected in Miles

The City of Nichols Hills has recently purchased a ENS (Emergency
Notification System) often referred to as a reverse 9-1-1 system, which
allows the City to contact residents by telephone, pager, cell phone, etc.
in the event of emergencies. This system uses ESRI-based software to allow
operators to select notification areas by drawing a circle or square on a
map. The company selling the product has requested that the City provide the
GIS data to operate this feature. We supplied them with data for Oklahoma
County that was a centerline file in a .shp format as per their
instructions.

Now the ENS company states that the data we supplied them is projected in
LAT/LONG feet and they need the data projected in LAT/LONG miles. Does
anyone have this data available or have the ability to re-project our data.
We do not have a GIS department or the ESRI products to make this conversion
ourselves. The format for the data is as follows:

----------

Projection: NAD_27 or NAD_83, projection in Lat/Long "MILES"
Although other projections can be viewed and selections can be made from
them, there is functionality that will be lost if the above stated
projection does not match.

Required: Street or Centerline file in a .shp format.  This centerline file
should contain standard geocoding data fields such as:
L_F_ADD (From Left Address 'Left Low Address')
R_F_ADD (From Right Address 'Right Low Address')
L_T_ADD (To Left Address ' Left Low Address')
R_T_ADD (To Right Address 'Right High Address')
Prefix (Street Name Prefix) ie:  "W" 42snd Street
Name (Street Name) ie: 4700 "Vincent" St South
Type (Street Type) ie: 4700 Vincent "St" South
Suffix (Street Name Suffix) ie: 4700 Vincent St "South"
ZipL (Zip Code on left side of street)
ZipR (Zip Code on right side of street)
**Field names do not need to be exact.  Zip fields, as well as the prefix
and suffix fields, are optional, although very useful in ensuring optimal
accuracy.

Additional Layers (Optional):  Layers such as hydrology, parks, railroads,
airports, highways, etc. may be helpful in creating a more visually
appealing project, with useful points of reference.  If you are not sure
which layers can/should be used, it is better to submit many layers, which
will be used at the discretion of the Avtex representative creating the
project.

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

Does anyone have a copy of Oklahoma County data in this projection, or have
a suggestion on what we should do?

Neil Gray

City of Nichols Hills

ngray at nicholshills.net

405-879-8870

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