Official Sources of Mapping Information

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Re: Official Sources of Mapping Information

Postby mapcat » Tue Nov 29, 2011 9:56 pm

jondrush wrote:Yes, I'm trying to avoid third party vendors or viewers so we don't run afoul of any licensing issues. I know there are free GIS data viewers out there, but the one's I've looked at seem scammy or malware-like.

ESRI's viewer isn't scammy or malware-infested. I don't use it much but when I do it's as a third source. Layers include their own topo maps, street maps, and aerials, plus OSM and Bing products.

In case anyone feels reluctant to use this private company's viewer, the list identifies the states who use it. IANAL, but since these states license it for public use, I don't think there's an issue. Here's the disclaimer from Mississippi's viewer:

Disclaimer

Information presented on this website is considered public information and may be distributed or copied. Use of appropriate byline, photo, or image credit is requested. It is strongly recommended that Mississippi Geospatial Clearinghouse (MGC) data be acquired directly from a MGC server and not through other sources that may alter the data in some way. While the MGC makes every effort to provide accurate and complete information, various data such as names, telephone numbers, etc. may change prior to updating. The MGC welcomes suggestions on how to improve our web site and encourages notification of any errors. The MGC provides no warranty, expressed or implied, as to the accuracy, reliability or completeness of furnished data.

Some of the documents on this server may contain live references or pointers to information created and maintained by other organizations. Please note that the MGC does not control and cannot guarantee the relevance, timeliness, or accuracy of these outside materials.

For security purposes and to ensure that this service remains available to all users, the State of Mississippi employs measures to identify security risks and vulnerabilities to prevent the upload, modification, or otherwise damage to data. Unauthorized attempts on this web site are strictly prohibited and may be punishable under the Computer Fraud and Abuse Act of 1986 and the National Information Infrastructure Protection Act.
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Re: Official Sources of Mapping Information

Postby mapcat » Sun May 06, 2012 3:49 pm

In case anyone thinks it would be easier to keep track of these in the wiki, I created a general page:

http://www.waze.com/wiki/index.php/Mapp ... _%28USA%29

Here's the Ohio page, for an example:

http://www.waze.com/wiki/index.php/Ohio
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Re: Official Sources of Mapping Information

Postby mapcat » Sun May 06, 2012 6:27 pm

Yeah, I was pleasantly surprised when that link showed up live right away. Thanks for giving me some more ideas.
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Re: Official Sources of Mapping Information

Postby mapcat » Mon Jul 09, 2012 10:55 pm

CBenson wrote:Although, not really an official source of mapping information, I recently came across this site: http://www.fhwa.dot.gov/trafficinfo/index.htm (National Traffic and Road Closure Information). It provides links to a bunch of sources (including links to all the state DOTs) that I find useful in addressing some URs.

Thanks. Added.
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Re: Official Sources of Mapping Information

Postby marigolds » Wed Feb 27, 2013 4:05 pm

State of Missouri spatial data clearinghouse:
http://msdis.missouri.edu/
This is the download link for every transportation file provided by the state:
ftp://msdis.missouri.edu/pub/state/transportation/st_trans06.e00.zip
But you are better off going here first and toggling on the transportation layers:
http://www.msdis.missouri.edu/data/themelist.html

They also have webservices:
http://msdis.missouri.edu/webservices/mapping/index.html
This is every road in the state cataloged by MoDOT as an ArcGIS REST endpoint:
http://msdisweb.missouri.edu/ArcGIS/rest/services/MoDOT_Roads_Quarterly_December_2012_WMS/MapServer
And as a KML generator REST endpoint:
http://msdisweb.missouri.edu/ArcGIS/rest/services/MoDOT_Roads_Quarterly_December_2012_WMS/MapServer/generatekml
These are ArcGIS REST endpoints for every quarterly updated of the roads layers:
http://msdisweb.missouri.edu/ArcGIS/rest/services/MSDIS_Download/MapServer/182
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Re: Official Sources of Mapping Information

Postby mwhead2 » Mon Feb 27, 2012 7:00 pm

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Re: Official Sources of Mapping Information

Postby nnote » Fri Mar 15, 2013 10:12 pm

http://maps.mcassessor.maricopa.gov/default.aspx
Central Arizona
Also AZ511.com for Highway info
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Re: Official Sources of Mapping Information

Postby OscarC » Wed Nov 30, 2011 2:55 am

Minnesota--
MN DOT Site:
- County Maps: http://www.dot.state.mn.us/maps/cadd/html/counties.html
- City Maps: http://www.dot.state.mn.us/maps/cadd/ht ... alpha.html
- Other (Metro maps, highways, traffic maps, etc): http://www.dot.state.mn.us/maps/index.html
- Construction maps: http://www.dot.state.mn.us/roadwork/current.html

Local government sites: http://www.state.mn.us/portal/mn/jsp/co ... Star&sp2=y

I've also used different sources of zip code boundary sites to help find some boundaries, especially in rural areas, but don't know about the copyrights or licensing on them so I won't post them.
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Re: Official Sources of Mapping Information

Postby Spil » Thu Feb 16, 2012 6:01 pm

WeeeZer14 wrote:NY - http://www.nysgis.state.ny.us/ State GIS Maps

This has been updated to GIS.NY.Gov

And, wow, how bad is it when the state GIS maps have three road-name errors just within a block of my house? Hate to see how bad the rest of the state must be!
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Re: Official Sources of Mapping Information

Postby thom_p » Thu Feb 23, 2012 10:22 pm

Tennessee: Hamilton County: http://maps.hamiltontn.gov/hcflex/
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