This convention is used in many places, such as: I'll like to expand the point raised by mkennedyĪll of this further confused by that fact that often even though the map is in Web Mercator(EPSG: 3857), the actual coordinates used are in lat-long (EPSG: 4326). So if you are making a web map, which uses the tiles from Google Maps or tiles from the Open Street Map webservice, they will be in Sperical Mercator (EPSG 3857 or srid: 900913) and hence your map has to have the same projection.

Projected coordinate system that is based on the wgs84 datum. The Open Street Map tiles and the WMS webservice, are in the The data in Open Street Map database is stored in a gcs with unitsĭecimal degrees & datum of wgs84. Google Maps is in a projected coordinate system that is based on the Google Earth is in a Geographic coordinate system with the wgs84 Is there such a thing as a permanent icon library, preferably maintained by Google?Īlso, is there some way I can test a link within the Javascript to determine whether the icon is there or not? I am relatively new to the language but if I could do this, then I could omit the 'icon:' reference to a missing icon and let the map revert to the Google default.There are a few things that you are mixing up. I would like something more like 'guaranteed-icons/ ' :-) I have found a couple of icon libraries at Google, like but the 'gmaps-samples' portion of the link does not give me a sense of permanence. This is especially important because from testing I see that if a custom marker link is broken I don't get the default marker. The only way I can see to do this is by referencing web urls that will be reliable over time. now I would like to customize the marker icons. An implication of this is that it can't reference other files because those files won't be present when the html file is opened by the recipient. I have an application that creates a map as a single html file that I want to be able to archive and to email to people.

Gmaps web