Re: [Talk-us] Updating unchanged TIGER imports to TIGER 2013
The other thing that has come up is that there are a lot of TIGER edges that do not correspond to OSM ways in either their old or new version In Indiana most of these seem to be linear water. Were these intentionally excluded from OSM? Or would it be useful to try to pick them up as part of the set of changes representing additions to TIGER between 2006 and 2013? 5.10 Hydrography Hydrography features and attributes are available by county in the following shapefiles: Area Hydrography County-based Shapefile Linear Hydrography County-based Shapefile The Area Hydrography Shapefile contains the geometry and attributes of both perennial and intermittent area hydrography features, including ponds, lakes, oceans, swamps, glaciers, and the area covered by large streams represented as double-line drainage. Single-line drainage water features can be found in the All Lines Shapefile and Linear Hydrography Shapefile. The Linear Hydrography shapefile contains all linear hydrography features with “H” (Hydrography) type MTFCC in the MAF/TIGER database by county. The shapefiles are provided at a county geographic extent and in linear elemental feature geometry. The content of the linear hydrography shapefile includes streams/rivers, braided streams, canals, ditches, artificial paths and aqueducts. A linear hydrography feature may include edges with both perennial and intermittent persistence. 5-40 The artificial path features may correspond to those in the USGS National Hydrographic Dataset (NHD). However, in many cases the features do not match NHD equivalent feature and will not carry the NHD metadata codes. Single-line drainage water features include artificial path features that run through double-line drainage features such as rivers and streams, and serve as a linear representation of these features. Shorelines for area hydrography can be found in the All Lines shapefiles with MTFCC set to either “P0002” (shoreline of perennial water feature) or “P0003” (shoreline of intermittent water feature). I believe TIGER water features were excluded because NHD data is more accurate and comprehensive in most locations. Somewhere else in the processing steps documentation, they mention that they simplify and adjust either, or both, to eliminate braiding, etc., ( like where a winding road follows a oxbowed river) - and that adjustment is tempered if either or both according to the significance as statistical area boundary between census periods. ___ Talk-us mailing list Talk-us@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-us
Re: [Talk-us] Updating unchanged TIGER imports to TIGER 2013
On 3/16/2013 5:06 PM, Russ Nelson wrote: I'm surprised by how bad the NHD data is. I downloaded some of it in .OSM format, and my casual hand digitization off Bing maps is much better. If I say so myself, which I do. That's not surprising if they last updated the NHD data between 1990 and 2005 on the average (although they are continuously updating parts of it). NHD was much better than I could get from the Yahoo imagery. Many places where I've been, I cannot get an accurate water feature location from Bing alone, but a survey + Bing imagery is required to get better than NHD. Results will vary based on land contours, tree cover, and the NHD survey methods. ___ Talk-us mailing list Talk-us@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-us
[Talk-us] Whole-US Garmin Map update - 2013-03-15
These are based off of Lambertus's work here: http://garmin.openstreetmap.nl If you have questions or comments about these maps, please feel free to ask. However, please do not send me private mail. The odds are, someone else will have the same questions, and by asking on the talk-us@ list, others can benefit. Downloads: http://daveh.dev.openstreetmap.org/garmin/Lambertus/2013-03-15 Map to visualize what each file contains: http://daveh.dev.openstreetmap.org/garmin/Lambertus/2013-03-15/kml/kml.html FAQ Why did you do this? I wrote scripts to joined them myself to lessen the impact of doing a large join on Lambertus's server. I've also cut them in large longitude swaths that should fit conveniently on removable media. http://daveh.dev.openstreetmap.org/garmin/Lambertus/2013-03-15 Can or should I seed the torrents? Yes!! If you use the .torrent files, please seed. That web server is in the UK, and it helps to have some peers on this side of the Atlantic. Why is my map missing small rectangular areas? There have been some missing tiles from Lambertus's map (the red rectangles), I don't see any at the moment, so you may want to update if you had issues with the last set. Why can I not copy the large files to my new SD card? If you buy a new card (especially SDHC), some are FAT16 from the factory. I had to reformat it to let me create a 2GB file. Does your map cover Mexico/Canada? Yes!! I have, for the purposes of this map, annexed Ontario in to the USA. Some areas of North America that are close to the US also just happen to get pulled in to these maps. This might not happen forever, and if you would like your non-US area to get included, let me know. -- Dave ___ Talk-us mailing list Talk-us@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-us
Re: [Talk-us] Updating unchanged TIGER imports to TIGER 2013
Eric, I'm in general favor of your idea. I think that if we can get more accurate, up to date data out of TIGER, then we should. I'd strongly encourage you to join us on the OSM US Import Committee list: http://lists.openstreetmap.org/listinfo/imports-us - Serge ___ Talk-us mailing list Talk-us@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-us
Re: [Talk-us] Updating unchanged TIGER imports to TIGER 2013
On 3/16/13 7:59 PM, Serge Wroclawski wrote: Eric, I'm in general favor of your idea. I think that if we can get more accurate, up to date data out of TIGER, then we should. I'd strongly encourage you to join us on the OSM US Import Committee list: http://lists.openstreetmap.org/listinfo/imports-us i'm interested in this too. i may have a need in the near future to work with Schoharie County, NY which is relatively untouched and has some of the iffier tiger 2005 stuff in NY. updating it to more current tiger would be a big step on the way to where it needs to go. i strongly support Serge's suggestion that you get on the import committee list. there are a bunch of smart, experienced mappers there who can provide excellent input. richard signature.asc Description: OpenPGP digital signature ___ Talk-us mailing list Talk-us@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-us
Re: [Talk-us] Updating unchanged TIGER imports to TIGER 2013
Thanks. I just joined the list and will send a message there. Eric On Sat, Mar 16, 2013 at 4:59 PM, Serge Wroclawski emac...@gmail.com wrote: Eric, I'm in general favor of your idea. I think that if we can get more accurate, up to date data out of TIGER, then we should. I'd strongly encourage you to join us on the OSM US Import Committee list: http://lists.openstreetmap.org/listinfo/imports-us - Serge ___ Talk-us mailing list Talk-us@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-us
