Merge pull request #57 from JakobMiksch/patch-1

Fix broken link

developers-guide.html

@@ -35,7 +35,7 @@ <h3>Introduction</h3>
                 contributing then please make pull requests on the <a href="https://github.com/cholmes/www.cogeo.org">Github Project</a>. In the meantime this document will just link to a few other resources</p>
 
 								<h3>Reading a Cloud Optimized GeoTIFF</h3>
-                <p>The easiest way to read a COG in a way that takes advantage of its unique properties is to use GDAL and its <a href="http://gdal.org/cpl__vsi_8h.html#a4f791960f2d86713d16e99e9c0c36258">VSI Curl</a> functionality. See the GDAL Wiki on Cloud Optimized GeoTIFF in its <a href="https://trac.osgeo.org/gdal/wiki/CloudOptimizedGeoTIFF#HowtoreaditwithGDAL">How to read it with GDAL</a> section. A majority of geospatial software in the world uses GDAL as a library, so incorporating it is likely the fastest way to incorporate COG reading in to your software.</p>
+                <p>The easiest way to read a COG in a way that takes advantage of its unique properties is to use GDAL and its <a href="https://gdal.org/user/virtual_file_systems#network-based-file-systems">VSI Curl</a> functionality. See the GDAL Wiki on Cloud Optimized GeoTIFF in its <a href="https://trac.osgeo.org/gdal/wiki/CloudOptimizedGeoTIFF#HowtoreaditwithGDAL">How to read it with GDAL</a> section. A majority of geospatial software in the world uses GDAL as a library, so incorporating it is likely the fastest way to incorporate COG reading in to your software.</p>
                 <p><a href="http://planet.com">Planet</a> produces all its data as COG, and has a little tutorial on how to <a href="https://developers.planet.com/tutorials/download-a-subarea/">download part of an image</a> using VSI Curl. Most of the tutorial is specific to working with the Planet API, but it shows the use of GDAL Warp with a COG to extract a single farm field from a larger image.
 
 								<h3>How to generate a Cloud Optimized GeoTIFF</h3>