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Official Sources of Mapping Information

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I'd like to start a stickied thread that will provide new editors a list of official sources of mapping information from their state governments. Please provide any resources you know of and I will edit this post as I get time. I'd prefer sources that do not require separate software to be downloaded beyond PDF readers and browser plug-ins. Unofficial sources can be listed too, but many of them are mash-ups and unstable or unreliable.

Alabama
Alabama
Alaska
Arizona
Arkansas
---Statewide Interactive Map

California
Colorado
Connecticut
Delaware
District of Columbia
Florida
Georgia
Hawaii
Idaho
Illinois
---County, City and Township Maps

Indiana
---Statewide Interactive Map
---Statewide Map

Iowa
---County and City Maps

Kansas
---County Maps
---City Maps

Kentucky
---Statewide Interactive Map

Louisiana
Maine
Maryland
---Grid maps
---Incorporated town maps
---Interactive map

Massachusetts
---Statewide map

Michigan
---Statewide Interactive Map

Minnesota
Mississippi
---Statewide Interactive Map

Missouri
---County Maps

Montana
Nebraska
---Statewide Map

Nevada
New Hampshire
New Jersey
---County maps

New Mexico
New York
---NYS Orthos Online (bookmarklet available in the Waze Wiki)

North Carolina
North Dakota
---Statewide Interactive Map

Ohio
Oklahoma
Oregon
Pennsylvania
---County Maps
---Municipal Maps
---Many other types of maps

Rhode Island
South Carolina
South Dakota
---Statewide Interactive Map

Tennessee
Texas
Utah
Vermont
Virginia
Washington
West Virginia
Wisconsin
Wyoming
---Statewide Map Requires downloads, provided by University of Wyoming

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Last edited by GizmoGuy411 on Wed Oct 23, 2013 1:52 pm, edited 8 times in total.
Reason: added NY Orthos link ~ Spil

Post by AlanOfTheBerg
orbitc wrote:
jondrush wrote:
Thanks
Forum etiquette: unless you are going to discuss a specific part of a post, do not quote. Especially, never quote a long post in its entirety. It is waste of space and serves no purpose.

Thanks!
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Post by AlanOfTheBerg
This info should be posted to the wiki, if you haven't already.
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Post by AndyPoms
mapcat wrote: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
We have a section right on the CT page (that you did catch when you made your state list) just for Mapping Utilities... (http://www.waze.com/wiki/index.php/Conn ... _Utilities)

I've only included state wide resources (that cover ALL of the 169 Cities & Towns) at this time because I haven't been able to reliably find (and re-find later) up-to-date maps online from the individual Cities & Towns... But we're a small state, and CT DOT does a great job - and their Functional Classification maps are by far the best way to determine road types in the state...
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Post by ArlenBystander
jmp316 wrote:Great idea. As an FYI, the Illinois link sent in the original post is very old and should not be used to gather current information on streets.
Yes, it does look like that IDOT general maps site contains older versions of the highway maps. At least the one township and one county I checked were last updated in the 90s.

The parent page has links maps such as the 5-year functional classification maps which have been updated more recently. Each county (we have 182) might have maps available on its own website.

There is a group of Illinois editors working on getting the state wiki pages, including reference info, in order so I'd recommend that (link is in my sig) for updated IL-specific resources going forward.
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Post by bgodette
Since mapcat mentioned them already ESRI also runs a service called ArcGIS Online and can load GIS info from a variety of sources, including newer Tiger datasets. However you do need to be mindful of what your "basemap" source is as they might not be license compatible with Waze.

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Post by bgodette
shawndoc wrote:
shawndoc wrote:Caltrans actually uses Google for their map:
http://quickmap.dot.ca.gov/
While not for GIS information, it is being used for official Caltrans construction alerts. Not sure if that makes it safe to use or not.
IMO I'd say the information contained in the construction markers is usable. It's information published elsewhere by Caltrans and contains all the information needed to locate what segment(s) it applies to.
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Post by BlackjackNY
Spil wrote:
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!
I can confirm that the GIS(at least in my area) is a mess. The county police based their database on it, which was a huge mistake. Thankfully, the fire service did not base their own database on GIS info.
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Post by CBenson
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.
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Post by cfreema
i also found this website here that has extremely good info. i use it all the time and it goes by incorporated cities/towns and zipcodes and unincorporated towns and is useful at getting borders because it provides an overlay over google maps which isn't perfect but is darned close. look at cheverly, maryland and the 20785 zip code and you will see where cheverly is in the zipcode and where hyattsville surrounds cheverly in the same zip, cheverly being an incorporated town that does not occupy the entire zip code. the maps are about midway down the page on the left. it also gives detailed populace info for the nerds in us all.

http://www.city-data.com/
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