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#16
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What free tools, on Windows & Linux, georeference PDF maps?
On 15 Jul 2018 03:29:57 GMT, R.Wieser wrote:
I just tried to point out that your approach of your problem is a bit ... skewed. You learn about the method of approach *and* the target *before* you go in, not while. Three things: 1. I (almost) always solve the problem (usually sooner rather than later); 2. You can't possibly help (simply because it's too complex for you); 3. But, you *tried* to help - which is what counts most. Thanks for at least looking up the software, and the formats, and for the attempt at offering technical advice. For that, I appreciate your posts. But this thread has been *useless* for the original question. So, unless someone actually knows something about the stated problem, then this thread is dead until I post the solution. |
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#17
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What free tools, on Windows & Linux, georeference PDF maps?
*TECHNICAL UPDATE:*
I just tested a working solution on Windows using the Quantum GIS freeware, which also works on Linux and on the Mac, so I'm sure it's a cross-platform solution that everyone can benefit from. How to view & edit tracks on USGS WMS databases using QGIS freeeware https://groups.google.com/d/msg/alt.comp.freeware/IeNTm2cOrd8/F_ftT-p5CAAJ In addition, for cross-platform mobile devices, this solution works: How to record tracks on USGS geocalibrated PDFs using Avenza freeware https://groups.google.com/forum/#!topic/comp.mobile.android/zNKD3jyeye4 How to record GPX tracks on iOS & Android freeware & copy to the desktop https://groups.google.com/d/msg/comp.mobile.android/zNKD3jyeye4/vxLvk87oAgAJ This solution, unfortunately, only works on Windows at this time! How to freely geocalibrate multiple USGS quadrangles into a single PDF map https://groups.google.com/d/msg/alt.comp.freeware/W3IjaKFeLrM/TpFbNWiIAAAJ What's missing, I think, are the following missing Windows/Linux solutions: a. How to use the Quantum GIS USGS WMS method wholly offline (if possible) b. How to combine & geoCalibrate USGS geoPDF quadrangles using Quantum GIS The reason that (a) is needed is because it's a bad idea to be required to use the Internet for personal private mapping solutions, while the reason for (b) is that the Avenza solution on the mobile device sucks when your hike crosses USGS quadrangle borders (which it often will do) so you need to be able to combine geocalibrated PDFs on the Windows or Linux desktop. (The current free solution for combining geoPDFs only works on Windows.) |
#18
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What free tools, on Windows & Linux, georeference PDF maps?
*ANOTHER TECHNICAL UPDATE:*
================================================== ========================== Here's how anyone on this ng can print their nearest USGS quadrangles. ================================================== ========================== Download & print USGS PDF maps of the desired quadrangles nearest you: 1. Create a directory to store your downloaded USGS topographic maps: For example: mkdir -p $HOME/database/map/usgs/ 2. Visit the USGS National Map Data Download & Visualization Services site: https://viewer.nationalmap.gov/launch/ 3. At top left, press "Download Maps" which takes you to a multipane page: https://viewer.nationalmap.gov/basic...e=Map%20V iew Note the right pane contains a map of the United States. 4. Left mouse drag your desired location to the center of that map. Click the + (zoom) 7 times (re-center as needed) to see quadrangles. It's simplest if you zoom until you have only 1 or 2 quadrangles in view. At most, zoom to only as many as 4 contiguous four-corner quadrangles. 5. In the left sidebar, click the blue "Find Products" button. 6. In the left sidebar under "Available Products", click "US Topo" "results". 7. In the left sidebar, scroll until you see the desired quadrangle. Once you find the desired quadrangle, right click its "Download" button. Choose to "Save Link As" so as to download the ~30MB PDF file. 8. Save the ~30MB PDFs using the default name of the quadrangle.pdf For example: $HOME/database/map/usgs/CA_Laurel_20150226_TM_geo.pdf $HOME/database/map/usgs/CA_Loma_Prieta_20150226_TM_geo.pdf $HOME/database/map/usgs/CA_San_Jose_West_20150304_TM_geo.pdf $HOME/database/map/usgs/CA_Santa_Teresa_Hills_20150226_TM_geo.pdf etc. Read this document for instructions on how to interpret USGS map margins: http://education.usgs.gov/lessons/mapmargin.pdf (details) http://education.usgs.gov/lessons/map_margins_2p.pdf (summary) ================================================== ========================== I called a local Kinkos/FedEx printer who charges $7.25 per sqft for color printing on regular paper. So a 2.5x2.5 foot color map on regular paper they said would be about $73.48 with California tax. Yikes. It's much cheaper to print to 8-1/2x11-inch paper using a freeware tiler: https://sourceforge.net/projects/posterazor/ And then manually tape it together. ================================================== ========================== See also: How to view & edit tracks on USGS WMS databases using QGIS freeeware https://groups.google.com/d/msg/alt.comp.freeware/IeNTm2cOrd8/F_ftT-p5CAAJ How to record tracks on USGS geocalibrated PDFs using Avenza freeware https://groups.google.com/forum/#!topic/comp.mobile.android/zNKD3jyeye4 How to record GPX tracks on iOS & Android freeware & copy to the desktop https://groups.google.com/d/msg/comp.mobile.android/zNKD3jyeye4/vxLvk87oAgAJ How to freely geocalibrate multiple USGS quadrangles into a single PDF map https://groups.google.com/d/msg/alt.comp.freeware/W3IjaKFeLrM/TpFbNWiIAAAJ ================================================== ========================== |
#19
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What free tools, on Windows & Linux, georeference PDF maps?
On 10 Aug 2018 23:06:05 GMT, Arlen Holder wrote:
8. Save the ~30MB PDFs using the default name of the quadrangle.pdf For example: $HOME/database/map/usgs/CA_Laurel_20150226_TM_geo.pdf $HOME/database/map/usgs/CA_Loma_Prieta_20150226_TM_geo.pdf $HOME/database/map/usgs/CA_San_Jose_West_20150304_TM_geo.pdf $HOME/database/map/usgs/CA_Santa_Teresa_Hills_20150226_TM_geo.pdf etc. I just combined those four quadrangles, which seemed to work fine offline! Here's what I just tried after downloading a set of four geospatial PDFs using the method and file types outlined in this post of a few moments ago: https://groups.google.com/d/msg/alt.comp.freeware/W3IjaKFeLrM/BCWbshWoCAAJ I figured I'd try a single quadrangle first, before trying to tile them. I wasn't sure if the USGS geospatial PDFs are "vector" or "raster". So I guessed at "vector" first. This pretty much worked, with minor complications of too many layers: .. View the newly downloaded CA_Loma_Prieta_20150226_TM_geo.pdf file: http://www.bild.me/bild.php?file=4462770geopdf00.jpg .. Start Quantum GIS 3.2.1 on Windows 10 http://www.bild.me/bild.php?file=9663160geopdf01.jpg .. QGIS:Layer Add Layer Add Vector Layer http://www.bild.me/bild.php?file=7538129geopdf02.jpg .. Data Source Manager Vector Source Vector Dataset(s) = C:\tmp\CA_Loma_Prieta_20150226_TM_geo.pdf http://www.bild.me/bild.php?file=5773673geopdf03.jpg .. Click [Add] (It's so slow, be careful not to click twice!) .. It asks "Select Vector Layers to Add" http://www.bild.me/bild.php?file=5004482geopdf04.jpg .. Not knowing any better, I hit [Select All] http://www.bild.me/bild.php?file=5858855geopdf05.jpg .. And then [OK] (It's so slow, be careful not to click twice!) http://www.bild.me/bild.php?file=1424688geopdf06.jpg .. And then [Close] (Be careful to only click once.) http://www.bild.me/bild.php?file=3545122geopdf07.jpg Well, that worked (albeit, as BeAr Ederson had warned, rather slowly). At least it's offline - which always is the goal all along. But now, the question comes how to *join* the four quadrangles in QGIS? Trying that process with a second quadrangle, seems to kind of work: http://www.bild.me/bild.php?file=9247140geopdf08.jpg *Notice in that screenshot that the corners actually line up!* Let's bring in a third contiguous quadrangle: http://www.bild.me/bild.php?file=9176734geopdf09.jpg And, the fourth: http://www.bild.me/bild.php?file=7754255geopdf10.jpg At this point, I decided to add the hiking track that I had saved. And then to zoom to the layer of that track. http://www.bild.me/bild.php?file=8848544geopdf11.jpg Notice it worked, kind of sort of, but not really all that well: http://www.bild.me/bild.php?file=1819179geopdf12.jpg The good news is that the USGS geospatial PDF quadrangles seem to line themselves up automatically, with the borders overlapping such that the actual map corners coincide at the correct GPS corner dots. I'm not sure how to make the four quadrangle map borders go away, but that's probably a "layer" that I hope can be made invisible. |
#20
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What free tools, on Windows & Linux, georeference PDF maps?
On 11 Aug 2018 00:46:22 GMT, Arlen Holder wrote:
I just combined those four quadrangles, which seemed to work fine offline! QGIS is working a LOT better now that I'm getting the hang of layers! The only thing I have left, I think, is to create a single large geospatial PDF out of the four quadrangle geospacial PDFs! Here's the progress so far... I loaded in the offline geospatial PDFs for the four quadrangles, which, when I turn on only the track and the terrain countours shows up quite beautifully! http://www.bild.me/bild.php?file=1343863layers01.jpg I'm not sure yet how to export the four quadrangles as a single map file (for input into Avenza crippleware on the iOS & Android mobile devices); but the great news is that the four maps aiign themselves perfectly automatically! http://www.bild.me/bild.php?file=8243968layers02.jpg It's amazing that the Quantum GIS software figures all this out! http://www.bild.me/bild.php?file=2137812layers03.jpg The result is that the four maps fit perfectly (where the blue lines you see here I put in after the fact to show where the map borders were): http://www.bild.me/bild.php?file=9710070layers04.jpg About the only thing I need to do now is save these four geospatial PDF quadrangles as a *single* (four-times larger) geospatial PDF quadrangle. If that works - I think we've achieved the goal set out in the beginning of this thread. Turning off the borders was due to turning off: [_]Map Frame Projection and Grids And I also turned off some of the grids [_]Map Collar Map Elements [_]Map Frame PLSS [_]Map Frame Woodland I've turned on the following "features" to view & save: [x]Map Frame Terrain Contours [x]Map Frame Geographic Names [xMap Frame Boundaries Jurisdictional Boundaries County or Equivalent [xMap Frame Geographic Names [xMap Frame Hydrography [xMap Frame Structures [xMap Frame Transportation Road Features [xMap Frame Transportation Road Names and Shields One by one I turned things on or off to get just what I wanted to see: http://www.bild.me/bild.php?file=6468310layers05.jpg This I saved as the perfect combination of the four quadrangles: http://www.bild.me/bild.php?file=2229776layers06.jpg And then I exported that database to PDF: http://www.bild.me/bild.php?file=9861338layers07.jpg The question is whether that PDF is a geospatial PDF that can be used on the mobile device in the Avenza crippleware to display tracks. http://www.bild.me/bild.php?file=8814128layers08.jpg Darn. That didn't work. It was just a "normal" PDf and not a geospatial PDF. I think I should have right clicked on the database, and then saved as "Geospatial PDF" format like I did earlier perhaps... http://www.bild.me/bild.php?file=8835052layers09.jpg The true test will be whether Avenza crippleware on iOS & Android will track on this saved geospacial four-quadrangle PDF - but for now - I need a quick test to figure out if a PDF is a regular PDF or a geospatial PDF. |
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