{"id":1710,"date":"2013-02-01T08:32:40","date_gmt":"2013-02-01T07:32:40","guid":{"rendered":"http:\/\/jgeo.nl\/o\/?p=1710"},"modified":"2016-03-17T09:47:23","modified_gmt":"2016-03-17T08:47:23","slug":"overlay-maps-the-browser-does-it-all","status":"publish","type":"post","link":"https:\/\/jgeo.nl\/o\/2013\/02\/01\/overlay-maps-the-browser-does-it-all\/","title":{"rendered":"Overlay maps: the browser does it all!"},"content":{"rendered":"

\"\"I created something similar before, but I simplified the code a bit, and the result is still exciting. I put some JavaScrtipting in my weblog, to overlay maps with each other. The result you can see on this blog entry from a past training<\/a>, when we had to draw our own map, and my latest post about the Midwinterrun<\/a>, where I overlayed an ancient map we got with the current topographic map.<\/p>\n

The fun is that you can change the opacity of the different layers. In the first example<\/a>, you can change the view to the map of the different runners, with and without the real, complete orienteering map underneath, or with the map semi-transparent.<\/p>\n

In the second example<\/a>, you can hover with your mouse over a slider, that changed the opacity-ratio of the two different maps.<\/p>\n

It is nice to see that some features in the landscape still remain visible, while others have completely gone. And it is remarkable that some features were apparenty not correctly mapped, one-and-a-half century ago, as they have not moved, for sure, in the mean time, but are shown on the map on a significantly deviating location. I tend to believe that the present map is correct.<\/p>\n

The JavaScript code is shown below:<\/div>\n
\r\n
<\/a>nieuwe kaart \u2190 <\/span> \u2192 oude kaart
\r\n(ga met je muis over het balkje om de kaart te wisselen)<\/p>\r\n
\r\n \r\n  \"\"\r\n <\/a>\r\n<\/div>\r\n
\r\n \r\n  \"\"\r\n <\/a>\r\n 
\r\n