Google Maps

Launch Google MapsLaunch Maps in LUNA Browser The over 120 historical maps in the Google Maps have been selected by David Rumsey from his collection of more than 150,000 historical maps; in addition, there are a few maps from collections with which he collaborates. These maps can also be seen in the Gallery layer of Google Earth, Rumsey Historical Maps layer, and in the Google Earth viewers on this website. All the maps contain rich information about the past and represent a sampling of time periods (1680 to 1930), scales, and cartographic art, resulting in visual history stories that only old maps can tell. Some of the maps fit perfectly in their modern spaces, while others (generally earlier period maps) reveal interesting geographical misconceptions of their time and therefore have to be more distorted to fit properly in Google Maps and Earth. The original historical maps are first made into digital images by scanning them with high resolution digital cameras.

Google Maps Mania Geospatial Indexing This document provides a more in-depth explanation of the internals of MongoDB’s 2d geospatial indexes. This material is not necessary for normal operations or application development but may be useful for troubleshooting and for further understanding. Calculation of Geohash Values for 2d Indexes When you create a geospatial index on legacy coordinate pairs, MongoDB computes geohash values for the coordinate pairs within the specified location range and then indexes the geohash values. To calculate a geohash value, recursively divide a two-dimensional map into quadrants. These two-bit values (00, 01, 10, and 11) represent each of the quadrants and all points within each quadrant. To provide additional precision, continue dividing each quadrant into sub-quadrants. Multi-location Documents for 2d Indexes New in version 2.0: Support for multiple locations in a document. You could then create a geospatial index on the locs field, as in the following:

Map Maker Google Map Maker officially closed on March 31, 2017, and many of its features are being integrated into Google Maps. Since 2008, the Google Map Maker community has edited and moderated millions of features to improve the Google Maps experience. To make it easier for all Google Maps users to contribute changes to the map, we’ve started to graduate functionality from Map Maker to Google Maps on both desktop and mobile. Key editing features currently available in Google Maps include: We’ll continue to add new editing features within Google Maps on an ongoing basis. To keep contributing your local knowledge to Google Maps and engage with a passionate community of likeminded individuals, we invite you to join the Local Guides program where you can do things like: Earn points Unlock rewards for submitting edits and other information Get early access to new Google Map features.

GDAL-OGR, le couteau suisse du géomaticien — GDAL v1.9.0 documentation Global Health, Local Knowledge GDAL - Geospatial Data Abstraction Library Night Earth - See the Earth at Night from Space! Professorship in Environmental Informatics at Aalto University Collections - Old Maps Online: Project Below are brief descriptions of the online digital map collections searchable and accessible through the OldMapsOnline portal. Nearly all the institutions providing online map collections have a much larger paper map collection available at their respective institutions, but the OldMapsOnline portal will only search and provide direct linkage to the online maps. During the JISC funded project we added collections from around the world. This funding has now finished but we plan to continue making content updates periodically. The participating institutions are: Biblioteca Nacional de Colombia: The growing digital collection from this national library includes both national and international maps as well as larger-scale maps of strategically important locations. British Library, Map Library: Cartography Associates, the David Rumsey Map Collection: Probably the largest free online digital collection of historical topographic maps and images. Charles University in Prague, The Map collection: