[Talk-us] Quick intro and request to contribute

Tod Fitch tod at fitchdesign.com
Tue Jan 14 00:38:14 UTC 2014

US101 on the Cuesta Grade north of SLO needs checking. The maxspeed values on US101 to the CA58 interchange and on CA58 east to CA33 I did recently on one of my trips south. But I did not split US101 where I got off and so the values south of that interchange on US101 are from my tagging to the north.

I'm pretty sure that from SLO to Buelton US101 is posted at 65 but there is a slow section south of Buelton where it comes out on the coast that I couldn't recall the transitions for (and they may be different north bound than for south bound so I haven't tagged those. OTOH that is in Santa Barbara County, not San Luis Obispo County.


On Jan 13, 2014, at 3:36 PM, stevea wrote:

> Hello Dave:
> In California, the California Public Records Act or CPRA (1) and recent court cases (2, 3) make data published by our government (public) entities consistent with OpenStreetMap's license.  This went all the way to the California Supreme Court and is established statute, and so is essentially legally unassailable.
> I (and I believe the greater OSM community) welcome your input of these data into OSM.  This is done by adding the correct speed_limit tags to the appropriate ways:  don't forget to add MPH otherwise the units are assumed to be km/h.  See http://wiki.openstreetmap.org/wiki/Speed_limit for our documentation.
> You might also want to take a look at existing tagging on roadways near you using the handy map at http://www.itoworld.com/map/124 which shows existing speed_limit tagging in OSM via a custom renderer built especially for that purpose.  For example see US-101 north of Cal Poly and California State Route 58 through Santa Margarita.
> It couldn't hurt to travel to the closest road and "check consistency of published data against on-the-ground reality."  Use this as a guide to judge for yourself the quality of the data.
> If you trust the data, give a local roadway a try by entering it into OSM and see if you like the way the results look (in the itoworld map), and then take it from there.  You might continue to manually add more, you might want to posit an import to the wider community (and get help, or do it yourself), you might point others to the data you have found and ask them to do an import.  But again, I welcome you to enter the data into OSM and "enjoy" the results!
> SteveA
> California
> (1) California Government Code, section 6250 et seq
> (2) County of Santa Clara vs. California First Amendment Coalition, Court of Appeal Sixth Appellate District #H031658, Super. Ct. No. CV 072630, (2009) where the court held "the CPRA contains no provisions either for copyrighting (this work of geographic data) or for conditioning its release on an end user or licensing agreement by the requester.  The record thus must be disclosed as provided in the CPRA, without any such conditions or limitations."
> (3)  Finally, in the Supreme Court of California, Sierra Club vs. Superior Court of Orange County (S194708) ruled that "digital mapping files known as geographic information systems must be released under the state's public records law."  (2013)
> See http://articles.latimes.com/2013/jul/08/local/la-me-adv-map-ruling-20130709 as well as http://articles.latimes.com/2010/jun/09/business/la-fi-digital-maps-20100609
>> I'm new to this mailing list, but have contributed little changes here
>> and there for almost two years in San Luis Obispo county, California.
>> I'd like to contribute more: specifically, speed limit info.  I recently
>> stubled across a document put out by the county Public Works department
>> that summarizes all of the county traffic codes, including the speed
>> limits of all county-maintained roads, and I would like to find out more
>> about how to incorporate this.  I have no illusions that my first act should
>> be to do a mass update or anything, but I think that if I knew what would
>> be useful information to provide, I could extract and process the data from
>> this document and give the data to someone else who does know what they're
>> doing.
>> What should be my first step(s)?
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