Re: [OSGeo-Discuss] Correct List for Newcomers
On 30/03/2011 18:06, Bob Kerstetter wrote: On Mar 29, 2011, at 4:17 PM, Peter wrote: 4. Try to get an accurate vector layer of the same terrain, that has recognizable locations that match your raster, load that up, and then use the from map tool, itll be the easiest way. Any suggestions where to find vector maps? All the ones I have found are somewhat squishy in their placement of islands and the details of coastlines. I have tried geological survey websites plus the general commercial web. I have some older maps I may scan in and trace the vectors myself. How do I determine the projections of these maps?___ There's also the global shoreline layers from NOAA: http://www.ngdc.noaa.gov/mgg/shorelines/gshhs.html Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss This mail was received via Mail-SeCure System. -- Micha Silver Arava Development Co 052-3666918 http://www.surfaces.co.il ___ Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss
Re: [OSGeo-Discuss] Correct List for Newcomers
Il giorno mer, 30/03/2011 alle 10.17 +1300, Peter ha scritto: 3. For some odd reason you cant paste coords into the UI. Odd because who remembers and types 9 digit numbers. Could you please add a ticket for this? Thanks. -- Paolo Cavallini: http://www.faunalia.it/pc ___ Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss
Re: [OSGeo-Discuss] Correct List for Newcomers
On Mar 29, 2011, at 4:17 PM, Peter wrote: 4. Try to get an accurate vector layer of the same terrain, that has recognizable locations that match your raster, load that up, and then use the from map tool, itll be the easiest way. Any suggestions where to find vector maps? All the ones I have found are somewhat squishy in their placement of islands and the details of coastlines. I have tried geological survey websites plus the general commercial web. I have some older maps I may scan in and trace the vectors myself. How do I determine the projections of these maps?___ Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss
RE: [OSGeo-Discuss] Correct List for Newcomers
I don't know if 1:10,000,000 is a large enough scale for you, but if it is, you might want to look at Natural Earth. Public Domain http://www.naturalearthdata.com/ You could also look at OpenStreetMap data. www.openstreetmap.org Most of the coastline data was imported from the Prototype Global Shoreline dataset http://wiki.openstreetmap.org/wiki/Prototype_Global_Shoreline. This data has been improved in some areas. David. -Original Message- From: discuss-boun...@lists.osgeo.org [mailto:discuss-boun...@lists.osgeo.org] On Behalf Of Bob Kerstetter Sent: Wednesday, March 30, 2011 11:07 AM To: OSGeo Discussions Subject: Re: [OSGeo-Discuss] Correct List for Newcomers On Mar 29, 2011, at 4:17 PM, Peter wrote: 4. Try to get an accurate vector layer of the same terrain, that has recognizable locations that match your raster, load that up, and then use the from map tool, itll be the easiest way. Any suggestions where to find vector maps? All the ones I have found are somewhat squishy in their placement of islands and the details of coastlines. I have tried geological survey websites plus the general commercial web. I have some older maps I may scan in and trace the vectors myself. How do I determine the projections of these maps?___ Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss ___ Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss
Re: [OSGeo-Discuss] Correct List for Newcomers
For the chart - you might look here http://historicalcharts.noaa.gov/ http://historicalcharts.noaa.gov/NOAA also has some shoreline datasets, as well as NGA. On Wed, Mar 30, 2011 at 10:19 AM, Fawcett, David (MPCA) david.fawc...@state.mn.us wrote: I don't know if 1:10,000,000 is a large enough scale for you, but if it is, you might want to look at Natural Earth. Public Domain http://www.naturalearthdata.com/ You could also look at OpenStreetMap data. www.openstreetmap.org Most of the coastline data was imported from the Prototype Global Shoreline dataset http://wiki.openstreetmap.org/wiki/Prototype_Global_Shoreline. This data has been improved in some areas. David. -Original Message- From: discuss-boun...@lists.osgeo.org [mailto: discuss-boun...@lists.osgeo.org] On Behalf Of Bob Kerstetter Sent: Wednesday, March 30, 2011 11:07 AM To: OSGeo Discussions Subject: Re: [OSGeo-Discuss] Correct List for Newcomers On Mar 29, 2011, at 4:17 PM, Peter wrote: 4. Try to get an accurate vector layer of the same terrain, that has recognizable locations that match your raster, load that up, and then use the from map tool, itll be the easiest way. Any suggestions where to find vector maps? All the ones I have found are somewhat squishy in their placement of islands and the details of coastlines. I have tried geological survey websites plus the general commercial web. I have some older maps I may scan in and trace the vectors myself. How do I determine the projections of these maps?___ Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss ___ Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss ___ Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss
Re: [OSGeo-Discuss] Correct List for Newcomers
Thanks to all. This has gotten me going in a very useful direction. I have looked at the various options and am starting with the information from Natural Earth Data. I am entering the ship's location log into Numbers (Mac OS spreadsheet) then importing into qgis. I will also try to export the vector layer as KML data and import that into Google Earth. I have tried tests and the paths show up on both applications -- qgis and Google Earth. This is really cool. On Mar 30, 2011, at 1:03 PM, Mike wrote: For the chart - you might look here http://historicalcharts.noaa.gov/ NOAA also has some shoreline datasets, as well as NGA. On Wed, Mar 30, 2011 at 10:19 AM, Fawcett, David (MPCA) david.fawc...@state.mn.us wrote: I don't know if 1:10,000,000 is a large enough scale for you, but if it is, you might want to look at Natural Earth. Public Domain http://www.naturalearthdata.com/ You could also look at OpenStreetMap data. www.openstreetmap.org Most of the coastline data was imported from the Prototype Global Shoreline dataset http://wiki.openstreetmap.org/wiki/Prototype_Global_Shoreline. This data has been improved in some areas. David. -Original Message- From: discuss-boun...@lists.osgeo.org [mailto:discuss-boun...@lists.osgeo.org] On Behalf Of Bob Kerstetter Sent: Wednesday, March 30, 2011 11:07 AM To: OSGeo Discussions Subject: Re: [OSGeo-Discuss] Correct List for Newcomers On Mar 29, 2011, at 4:17 PM, Peter wrote: 4. Try to get an accurate vector layer of the same terrain, that has recognizable locations that match your raster, load that up, and then use the from map tool, itll be the easiest way. Any suggestions where to find vector maps? All the ones I have found are somewhat squishy in their placement of islands and the details of coastlines. I have tried geological survey websites plus the general commercial web. I have some older maps I may scan in and trace the vectors myself. How do I determine the projections of these maps?___ Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss ___ Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss ___ Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss ___ Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss
Re: [OSGeo-Discuss] Correct List for Newcomers
On Mar 28, 2011, at 9:27 PM, Alex Mandel wrote: On 03/28/2011 05:43 PM, Bob Kerstetter wrote: Hello, Is this the correct list for asking newbie questions? For example, I am using the decklogs from a 1940s US Navy cruiser to trace its journey's from 1942 through 1945. I know how to enter coordinates, draw lines and load maps, but where do I obtain a specific map? I need one covering the entire Pacific Ocean as it was defined during that era. I would like the map to show the Pacific and all of its islands, including small areas such as Yap and Ulithe, for example. I would also like to have a layer showing the geographic structures on the Pacific floor, such as the IBM arc. Do resources such as these exist, or do I need to create my own? I have searched the Web for answers but really don't know enough to enter search criteria correctly. snip could you please clarify what software you are using so we can direct you to the more appropriate list on that? I am using Quantum GIS on Mac OS X. Of the course the other approach is to more generally ask what software should you be using for your particular use case. Is QGIS the correct software to use? It allows me to plot locations and draw line between them. Personally if you know where to access a paper reproduction I would say digitize it, georeference it and use that as your base map. How do you georeference a map? I have paper maps. Enjoy, Alex ___ Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss
RE: [OSGeo-Discuss] Correct List for Newcomers
Bob, You might want to look at the Perry-Castaneda Library, University of Texas at Austin. Here is a link to their historical maps. http://www.lib.utexas.edu/maps/historical/index.html There are actually a ton of WWII era maps of the Pacific. According the the FAQ, most of the maps are in the Public Domain. http://www.lib.utexas.edu/maps/faq.html (Of course, verify that the terms of use match your needs.) You may have to georeference the maps yourself. David. -Original Message- From: discuss-boun...@lists.osgeo.org [mailto:discuss-boun...@lists.osgeo.org] On Behalf Of Alex Mandel Sent: Monday, March 28, 2011 9:28 PM To: OSGeo Discussions Subject: Re: [OSGeo-Discuss] Correct List for Newcomers On 03/28/2011 05:43 PM, Bob Kerstetter wrote: Hello, Is this the correct list for asking newbie questions? For example, I am using the decklogs from a 1940s US Navy cruiser to trace its journey's from 1942 through 1945. I know how to enter coordinates, draw lines and load maps, but where do I obtain a specific map? I need one covering the entire Pacific Ocean as it was defined during that era. I would like the map to show the Pacific and all of its islands, including small areas such as Yap and Ulithe, for example. I would also like to have a layer showing the geographic structures on the Pacific floor, such as the IBM arc. Do resources such as these exist, or do I need to create my own? I have searched the Web for answers but really don't know enough to enter search criteria correctly. If this is not the correct list, please excuse me. Thank you. Bob Hi Bob, Yes, this is a great place for people new to Open Source Geospatial to ask for some direction on where to find help. But no, this probably isn't the right place to ask about a specific computer application. However the direction we send you is going to be based on which software you were referring to in your post, could you please clarify what software you are using so we can direct you to the more appropriate list on that? Of the course the other approach is to more generally ask what software should you be using for your particular use case? That sort of question is very appropriate for this list. I find the question of finding period accurate maps of WWII in a digital form a very intriguing question, and would love to hear what others have to say on the topic. Personally if you know where to access a paper reproduction I would say digitize it, georeference it and use that as your base map. Enjoy, Alex ___ Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss ___ Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss
RE: [OSGeo-Discuss] Correct List for Newcomers
Bob, To georeference your images, you could use an online app like Map Warper: http://warper.geothings.net/ Or, you can use one of the georeferencing plugins for QGIS. Here is a blog post that talks about using QGIS for georeferencing: http://geo.distortions.net/2010/11/georeferencing-with-gdal-17-and-qgis-16.html Here is a .pdf of a lab demo on georeferencing using QGIS. http:// courses.umass.edu/nrc297s/PDFs/Lab_Georeferencing_with_QGIS.pdf For specific help on georeferencing using QGIS, I would contact the QGIS-User list. You can join here: http://lists.osgeo.org/mailman/listinfo/qgis-user David. -Original Message- From: discuss-boun...@lists.osgeo.org [mailto:discuss-boun...@lists.osgeo.org] On Behalf Of Bob Kerstetter Sent: Tuesday, March 29, 2011 3:01 AM To: t...@wildintellect.com Cc: OSGeo Discussions Subject: Re: [OSGeo-Discuss] Correct List for Newcomers On Mar 28, 2011, at 9:27 PM, Alex Mandel wrote: On 03/28/2011 05:43 PM, Bob Kerstetter wrote: Hello, How do you georeference a map? I have paper maps. ___ Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss ___ Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss
Re: [OSGeo-Discuss] Correct List for Newcomers
The qgis georef plugin is good with a few regrettable UI odditys. (QGIS 1.6 WIN). 1. It essentially uses brute force to distort the raster to try to make your grid control points match. If you know the projection of the source raster then there are better ways see below. 2. A trap for young players is that any method but linear will distort the raster, ie rotate or squish. None of this is made clear by the plugin. 3. For some odd reason you cant paste coords into the UI. Odd because who remembers and types 9 digit numbers. 4. Try to get an accurate vector layer of the same terrain, that has recognizable locations that match your raster, load that up, and then use the from map tool, itll be the easiest way. Now if you know the projection of the source raster, why mess around with it. Use the QGIS | raster | warp tool which warps between two mathematically known projections, and not introduce any more noise, and assigns the source srs, and converts to geotiff all in one action. One newbie to another mate. Theres lots to learn, allow some time or youll find it frustrating. Peter Bob Kerstetter wrote: On Mar 28, 2011, at 9:27 PM, Alex Mandel wrote: On 03/28/2011 05:43 PM, Bob Kerstetter wrote: Hello, Is this the correct list for asking newbie questions? For example, I am using the decklogs from a 1940s US Navy cruiser to trace its journey's from 1942 through 1945. I know how to enter coordinates, draw lines and load maps, but where do I obtain a specific map? I need one covering the entire Pacific Ocean as it was defined during that era. I would like the map to show the Pacific and all of its islands, including small areas such as Yap and Ulithe, for example. I would also like to have a layer showing the geographic structures on the Pacific floor, such as the IBM arc. Do resources such as these exist, or do I need to create my own? I have searched the Web for answers but really don't know enough to enter search criteria correctly. snip could you please clarify what software you are using so we can direct you to the more appropriate list on that? I am using Quantum GIS on Mac OS X. Of the course the other approach is to more generally ask what software should you be using for your particular use case. Is QGIS the correct software to use? It allows me to plot locations and draw line between them. Personally if you know where to access a paper reproduction I would say digitize it, georeference it and use that as your base map. How do you georeference a map? I have paper maps. Enjoy, Alex ___ Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss ___ Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss
[OSGeo-Discuss] Correct List for Newcomers
Hello, Is this the correct list for asking newbie questions? For example, I am using the decklogs from a 1940s US Navy cruiser to trace its journey's from 1942 through 1945. I know how to enter coordinates, draw lines and load maps, but where do I obtain a specific map? I need one covering the entire Pacific Ocean as it was defined during that era. I would like the map to show the Pacific and all of its islands, including small areas such as Yap and Ulithe, for example. I would also like to have a layer showing the geographic structures on the Pacific floor, such as the IBM arc. Do resources such as these exist, or do I need to create my own? I have searched the Web for answers but really don't know enough to enter search criteria correctly. If this is not the correct list, please excuse me. Thank you. Bob http://villagehiker.com___ Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss
Re: [OSGeo-Discuss] Correct List for Newcomers
On 03/28/2011 05:43 PM, Bob Kerstetter wrote: Hello, Is this the correct list for asking newbie questions? For example, I am using the decklogs from a 1940s US Navy cruiser to trace its journey's from 1942 through 1945. I know how to enter coordinates, draw lines and load maps, but where do I obtain a specific map? I need one covering the entire Pacific Ocean as it was defined during that era. I would like the map to show the Pacific and all of its islands, including small areas such as Yap and Ulithe, for example. I would also like to have a layer showing the geographic structures on the Pacific floor, such as the IBM arc. Do resources such as these exist, or do I need to create my own? I have searched the Web for answers but really don't know enough to enter search criteria correctly. If this is not the correct list, please excuse me. Thank you. Bob Hi Bob, Yes, this is a great place for people new to Open Source Geospatial to ask for some direction on where to find help. But no, this probably isn't the right place to ask about a specific computer application. However the direction we send you is going to be based on which software you were referring to in your post, could you please clarify what software you are using so we can direct you to the more appropriate list on that? Of the course the other approach is to more generally ask what software should you be using for your particular use case? That sort of question is very appropriate for this list. I find the question of finding period accurate maps of WWII in a digital form a very intriguing question, and would love to hear what others have to say on the topic. Personally if you know where to access a paper reproduction I would say digitize it, georeference it and use that as your base map. Enjoy, Alex ___ Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss
