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Interactive maps on the website
Rob Williams
Admin
06/28/2018 - 7:11 am
Member Since: 09/20/2009
Forum Posts: 1350
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Just to let everyone know - the interactive maps (including the maps on the trail info pages) may stop working soon.  Google has changed their policy on free map access and has drastically reduced the number of free hits per day.  I will be updating the maps to use an open source framework, but it will take a while to get it done and convert all the pages.  Until that time, if the number of hits has gone over the free threshold the maps will stop working.

Rob Williams
Admin
07/24/2018 - 6:42 am
Member Since: 09/20/2009
Forum Posts: 1350
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FYI, the topo maps on the trail pages are no longer functional - you will get a page showing gmap4 (the tool underlying the maps) is no longer functional due to changes in how Google deals with maps. 

The maps page still seems to be functioning normally - I will be working on converting all of the maps to a new framework, but it will take a while.

Rob Williams
Admin
07/30/2018 - 7:46 pm
Member Since: 09/20/2009
Forum Posts: 1350
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I have started the process of updating the trail pages with the new interactive map links.  There are a lot of pages so it will take a bit to complete, but I am working on them in stages.  The replacement is not as full featured as the previous solution was, but it seems to work pretty well.

Rob Williams
Admin
07/31/2018 - 6:39 pm
Member Since: 09/20/2009
Forum Posts: 1350
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I believe I have completed the conversion of all the interactive maps on the site to the new format.  The process was very manual and time consuming.  I think I did it all correctly, but if anyone sees anything wrong with any of the maps, please let me know.  The new viewer may change over time - I will be investigating some other ideas I have, but at least we now have a map viewer again.

Rob Williams
Admin
08/09/2018 - 4:53 pm
Member Since: 09/20/2009
Forum Posts: 1350
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I have replaced the map viewer with a newer, better version that has more functionality.  It is also used on both the trail info pages and the link for overlaying historical maps.  You can now overlay any/all of the historical maps we have "webified" (created tiles for) and adjust the opacity of each map to see how they line up.

The alignment isn't as good as I would like - I'm still investigating better ways of georeferencing the images so that they are more accurately located.  But for now, they will do.

If you are interested in maps, routes, etc, take a look and play with it.  It is pretty amazing what can be done with the new map frameworks.

New map viewer page

I'm still testing and debugging it, but it seems to work pretty well thus far, which is why I put it in place.  If you find any issues, or have any questions on it, please let me know.

Rob Williams
Admin
08/18/2018 - 9:18 am
Member Since: 09/20/2009
Forum Posts: 1350
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More changes (hopefully improvements) to the maps on the site.  I've re-done all the map tiles for the overlay map - hopefully they are lined up a bit better than the old tiles were.  The old maps were geo-referenced in about 4 spots - the new ones were geo-referenced in about 20 different areas.  For those who don't know, geo-referencing is the task of mapping a scanned image to coordinates on the ground so that it can be used in mapping software.  Without those references, the software has no idea what territory the map covers. 

In looking at the new tiles, they look like they line up better to newer maps, although some of them are a little shy on detail, so it is hard to know for sure.  Hopefully they are a little more useful.   I also added a new overlay map from 1958, and some USGS quads from 1985ish (which still show some old roads that don't show up on other maps).  There are now 11 different options for historical overlay maps (1916, 1931, 1935, 1938, 1946, 1952, 1958, 1963, 1966, 1972, 1985).

The last change was one that was required by the hosting provider.  I had to migrate all the map data and tiles from one datacenter to another, which required a few changes to several pages and links.  I have tried to catch broken links from the changes, but it is possible I missed something.  If you see anything odd on any of the pages (404 or page not found errors, etc), please send an email to webmaster@trailadvocate.org.

I think this finishes up all the mapping changes on the site for now.

Rob Williams
Admin
09/09/2018 - 2:53 pm
Member Since: 09/20/2009
Forum Posts: 1350
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I've made a few more enhancements to the map viewer page.  Mostly they are things that I used from the gmap4 website, so I found them useful.  I experimented with different print options, and ended up just using the browser print function, with the addition of a title section that you can add.  CalTopo is still the king when you want a really nice printed map.  I also added the ability to add either freehand or poly (segmented) lines to a map.  You can't save them permanently, but it is sometimes nice to annotate on a map to print it (like a planned route or something).

As always if you find anything that seems odd, or if there are features you would find useful, please send an please send an email to webmaster@trailadvocate.org

Rob Williams
Admin
10/04/2018 - 6:33 am
Member Since: 09/20/2009
Forum Posts: 1350
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I made a few last tweaks to the map viewer pages.  I removed the freehand line drawing (it seemed kind of difficult to use correctly and I couldn't get it to work the way I wanted it to) and added the ability to download drawn tracks and cleaned up a few other features and optimizations.  At this point these pages have all the functionality I was thinking of or used on the gmap4 pages, so I'm considering them "done" unless I find issues or people have requests for new functionality.

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