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The new road dataset was created directly from the local county
planning departments and from our state Dept of Transportation. This
includes spatial line work as well as updated address ranges, postal
codes, and names. The data were then merged together to form a
state-wide mosaic and fit to align with our high resolution 2007
orthophotography, which it does very well at about 1:1000 and fairly
well (line still stays within street on photo, just not center) down to
1:200 in most areas.<br>
<br>
<br>
Spatially it's no contest. I've attached just a few simple images to
show what I mean. These show our new dataset in red vs TIGER 2007 in
purple. Remember that the red lines match the hi-res photography.<br>
<br>
<br>
Attributes are also an improvement for geocoding, routing, and naming.
Attached is a very small extract of the available data fields. I work
closely with our state GIS data providers and users (including county
planning departments, DOT, Dept of Education, Dept of Env Resources,
private consultants, University staff, etc...) and this new dataset is
generally agreed upon as the best option. There was a lot of money
paid to work on this data and create a high-quality dataset. The data
I want to contribute to OSM is the "unrestricted" part of a larger data
collection effort. (I just checked the license agreement and it
clearly states unrestricted rights to geometry and selected attributes
(those attached in dbf file.)<br>
<br>
<br>
This dataset does not have any POIs. It is simply line work and
attributes for mapping, routing, and geocoding.<br>
<br>
<br>
Good question about contacting OSM editors of this data. I can easily
contact most of the GIS data professionals and
govt'/consultant/University people who typically with transportation
data. However, that does leave out the single individual, say at home,
who modifies the data. Not sure how often that happens. I can always
keep an copy of the current OSM data before uploading the new data set
and replace parts of needed. Or is there a way to find any edits made
since the intial loading of the TIGER?<br>
<br>
- John<br>
<br>
<br>
<br>
Dave Hansen wrote:
<blockquote cite="mid:1214407211.12367.96.camel@nimitz" type="cite">
<pre wrap="">On Wed, 2008-06-25 at 11:00 -0400, John Callahan wrote:
</pre>
<blockquote type="cite">
<pre wrap="">To answer your question...Yes, our new road dataset is a significant
improvement over current TIGER data (which I obtained from
<a class="moz-txt-link-freetext" href="http://www.census.gov/geo/www/tiger/tgrshp2007/tgrshp2007.html">http://www.census.gov/geo/www/tiger/tgrshp2007/tgrshp2007.html</a>)
</pre>
</blockquote>
<pre wrap=""><!---->
Could you qualify that a bit for us? How much better? In what ways?
Not only do we have the TIGER data itself, we also have the several
months of work from mappers since the TIGER data was uploaded. What I
did before uploading the TIGER data, and *especially* before uploading
over something was check with all the mappers in the area that I could
find. I showed them the TIGER data versus what they had and let them
make the choice to either take it or leave it. I think it would be nice
to do the same for this new data set.
If you see DaveHansen as the author, ignore me. That was all from the
TIGER upload.
-- Dave
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</pre>
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