[Talk-us] More TIGER importing
Hey, is there some sort of tutorial for a beginner (me) to import TIGER 2011 data for a really small town (Wheatland, CA)? I'm going to be doing a bus route there, but half the streets on it aren't even in OSM. Any help appreciated. -Alexander ___ Talk-us mailing list Talk-us@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-us
Re: [Talk-us] More TIGER importing
On 3/14/2012 6:40 AM, Alexander Jones wrote: Hey, is there some sort of tutorial for a beginner (me) to import TIGER 2011 data for a really small town (Wheatland, CA)? I'm going to be doing a bus route there, but half the streets on it aren't even in OSM. Welcome to OpenStreetMap! The good news is that the area around Wheatland hasn't been edited by a license decliner, so it will be safe to work there; no data will be removed in April 2012. (per http://cleanmap.poole.ch/). The tool most of us have been using for this is JOSM, and some variation of the methods here: http://wiki.openstreetmap.org/wiki/Manual_conflation http://ksmapper.blogspot.com/2012/03/remapping-using-tiger-2011.html I would add to these to use JOSM's Simplify way to prevent bringing in streets where a single block contains 200 nodes. Just converting the TIGER shapefiles into OSM format is a challenge - I've uploaded a copy of Yuba county from 2011 - http://www.greenvilleopenmap.info/Yuba_CA.zip This is not the most advanced conversion algorithm, but should be usable.I can see where the new subdivisions have been added around Wheatland, so this should help.It's important to be sure that only the ways you edit are uploaded, and not the entire file. My method is something like this: 1. Download the area of interest in JOSM. 2. Open the OSM TIGER file 3 After finding the new or corrected roads, go to the TIGER layer 4 Select the new roads to be imported 5 Activate the downloaded data layer 6 Paste the new roads 7 Simplify way to clean up geometry 8 Be sure the roads are properly connected to existing roads 9 Add turning circles, etc. In many cases the new TIGER geometry must be corrected to align to aerial. If you have a number of GPS traces, be sure to align the aerial imagery to the GPS traces first. ___ Talk-us mailing list Talk-us@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-us
Re: [Talk-us] More TIGER importing
On Wed, Mar 14, 2012 at 8:53 AM, Mike N nice...@att.net wrote: [snip] Just converting the TIGER shapefiles into OSM format is a challenge - I've uploaded a copy of Yuba county from 2011 - http://www.greenvilleopenmap.info/Yuba_CA.zip Alexander, I'd recommend you use this data for testing the process only, but not uploading, as it has not been processed thoroughly yet. I personally believe, and I think consensus is growing, that none of the tiger:* tags should be imported (I delete all of them after working on a way). Ref tags should be populated with the route number, such as SR 20, and oneway tags seem to be missing from dual carriageways. Also, the segments need to be glommed, that is joining multiple ways with the same tags into one way, to make future editing easier. In other words, please be careful, it is not a simple process. The only thing I would add is that you should only do a very small section, such as a new subdivision, then come back to this list and let us know the changeset ID/link so we can take a look at it. -Josh ___ Talk-us mailing list Talk-us@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-us
Re: [Talk-us] More TIGER importing
Josh Doe wrote: On Wed, Mar 14, 2012 at 8:53 AM, Mike N nice...@att.net wrote: [snip] Just converting the TIGER shapefiles into OSM format is a challenge - I've uploaded a copy of Yuba county from 2011 - http://www.greenvilleopenmap.info/Yuba_CA.zip Alexander, I'd recommend you use this data for testing the process only, but not uploading, as it has not been processed thoroughly yet. I personally believe, and I think consensus is growing, that none of the tiger:* tags should be imported (I delete all of them after working on a way). Ref tags should be populated with the route number, such as SR 20, and oneway tags seem to be missing from dual carriageways. Also, the segments need to be glommed, that is joining multiple ways with the same tags into one way, to make future editing easier. In other words, please be careful, it is not a simple process. The only thing I would add is that you should only do a very small section, such as a new subdivision, then come back to this list and let us know the changeset ID/link so we can take a look at it. -Josh Yikes, I already uploaded it! :X The changeset is here[1]. Please revert if necessary. I'll be asleep the rest of the day, and I'll be back at around 7 PM Central. [1] http://www.openstreetmap.org/browse/changeset/10978229 -Alexander ___ Talk-us mailing list Talk-us@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-us
Re: [Talk-us] More TIGER importing
On 3/14/2012 11:44 AM, Alexander Jones wrote: Yikes, I already uploaded it! :X The changeset is here[1]. Please revert if necessary. I'll be asleep the rest of the day, and I'll be back at around 7 PM Central. I'd say you did a good job - everything looks to be connected. Per latest standards: here is an update for the county without tiger: tags and with like-named ways already combined. (We're updating procedures as we go). http://www.greenvilleopenmap.info/Yuba_CA.zip Although roads will be split later as more details are surveyed (speed limits, bus routes, etc), multiple segments of the same street can be (c)ombined in JOSM to make future edits easier. One thing I see is that part of McDevitt Drive is named just 'McDevitt'. I frequently see this in TIGER data, and I'm guessing both of those would be McDevitt Drive. The tiger:reviewed=no tag usage varies with each person, but generally anything validated by a human against local knowledge or an aerial image doesn't need the tiger:reviewed tag at all. ___ Talk-us mailing list Talk-us@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-us
Re: [Talk-us] More TIGER importing
On 3/14/2012 11:44 AM, Alexander Jones wrote: I personally believe, and I think consensus is growing, that none of the tiger:* tags should be imported (I delete all of them after working on a way). Ref tags should be populated with the route number, such as SR 20, and oneway tags seem to be missing from dual carriageways. Also, the segments need to be glommed, that is joining multiple ways with the same tags into one way, to make future editing easier. I agree that tiger: tags are not really useful when bringing in new data. I had toyed with algorithms to match TLID values to unnamed streets/driveways in the old data, but even then there is no reason to upload TLID with new data. So I've uploaded the data again with glommed street segments: http://www.greenvilleopenmap.info/Yuba_CA.zip Check it out and confirm that it makes sense. And certainly, if better state or county data is available, it would make sense to use that instead of TIGER. Otherwise this is useful for at least street name + geometry (of varying quality). Should we write this up in the Wiki somewhere? I remember bits and pieces of this procedure being placed there, but cannot find them now. The master wiki TIGER page at http://wiki.openstreetmap.org/wiki/Tiger or the main links don't seem to address the subject either. ___ Talk-us mailing list Talk-us@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-us
Re: [Talk-us] More TIGER importing
On 3/14/2012 8:37 PM, Mike N wrote: The tiger:reviewed=no tag usage varies with each person, but generally anything validated by a human against local knowledge or an aerial image doesn't need the tiger:reviewed tag at all. I would disagree with this - reviewing should include verifying the street name. If you just check against aerials, especially in an area where TIGER is imprecise (hence a suburban street may be drawn in the rough location of the next one over), you could let many name errors through. Depending on the state or local government, you may be able to verify names against an official dataset. Otherwise subdivision plats work for the endless suburban superblocks that nobody wants to survey. ___ Talk-us mailing list Talk-us@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-us
