[Talk-us] Whole-US Garmin Map update - 2012-06-29
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/2012-06-29 Map to visualize what each file contains: http://daveh.dev.openstreetmap.org/garmin/Lambertus/2012-06-29/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/2012-06-29 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] Shorelines of highly variable lakes
Note that if you have the desired surface level, you can use USGS topos to place the shoreline on the correct contour. ___ Talk-us mailing list Talk-us@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-us
Re: [Talk-us] Shorelines of highly variable lakes
On 06/29/2012 09:22 PM, James Umbanhowar wrote: I have just had a correspondence with another mapper who was remapping Lake Mead shorelines to match new imagery. Due to a multi-year drought, Lake Mead and other reservoirs in the west have had significantly declining water levels. However, the lake levels could increase dramatically if there were a couple of years of normal/high water. Alternately, Devil's Lake in North Dakota has had many years of increasing water levels as the closed basin it drains has had relatively high precipitation. The question I have for y'all is do we have any recommendations for how to map these? For the reservoirs, I think that one could make an argument for mapping the full level and tagging it with landuse reservoir (which is rendered as water), but is there any value in drawing lower lake levels if they persist for many years? Would it be useful to date the imagery/ survey date used for the shoreline? Although this answer probably won't help you much, I'd much like to see it like it is done on some maps with lake Aral, where the 1970's shoreline is shown in a lightblue outline (and a small text by it). But that's a renderer thing, and I'm at a loss to find a tag for it. It could then look something like these two images: http://www.roalter.it/pub/img/shore-in.png http://www.roalter.it/pub/img/shore-out.png As far as I know, with OSM the shoreline should be drawn at the highest point/high tide (see http://wiki.openstreetmap.org/wiki/Tag:waterway%3Driverbank, under Varying water level) -- Cheers, Alex ___ Talk-us mailing list Talk-us@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-us
[Talk-us] Shorelines of highly variable lakes
I have just had a correspondence with another mapper who was remapping Lake Mead shorelines to match new imagery. Due to a multi-year drought, Lake Mead and other reservoirs in the west have had significantly declining water levels. However, the lake levels could increase dramatically if there were a couple of years of normal/high water. Alternately, Devil's Lake in North Dakota has had many years of increasing water levels as the closed basin it drains has had relatively high precipitation. The question I have for y'all is do we have any recommendations for how to map these? For the reservoirs, I think that one could make an argument for mapping the full level and tagging it with landuse reservoir (which is rendered as water), but is there any value in drawing lower lake levels if they persist for many years? Would it be useful to date the imagery/ survey date used for the shoreline? James ___ Talk-us mailing list Talk-us@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-us