Yang Zhang, associate professor, and Matthew W. McBroom, professor, with Stephen F. Austin State University, provide a brief systematic introduction to KML (Keyhole Markup Language) files.
Long before the advent of radio navigation and Global Navigation Systems (GPS) to assist in air flight, the Transcontinental Airway System was developed to aid nighttime airmail flights. Proposed by the National Advisory Committee for Aeronautics (NACA), the TAS was a series of beacons on concrete arrow platforms to form […]
Every June, my local paper is filled with the local private school announcements containing lists and lists and lists of where students have been accepted to. With all the private schools competing with each other to showcase college acceptances for that year, creating a map showing the locations of colleges […]
Geocoding a dataset to produce a georeferenced layer requires access to a basemap to which the location data is tied. For example, if you have a list of addresses, you will need a street file with address ranges or a parcel database with addresses in order to geolocate that list. […]
Eric Fischer, a photographer, has done his own analysis of geotagged maps on Flickr with his The Geotaggers’ World Atlas. Over fifty major cities are represented in his set. On top of OpenStreet base maps, Fischer used perl scripts to identify and plot the clusters of locations. The lines show the […]
The use of KML is becoming ever more common as a file format for displaying geographic data on the web. In April, KML was accepted as an OGC standard. Given the increasing use of KML, ensuring that your KML code is compliant is important. Galdos Systems recently announced the availability of a […]
Sponsored by UNESCO and Fuji Film, the work was an ambitious project by the photographer Yann Arthus-Bertrand to document many of the world’s most interesting places and to examine the effects of humans on various corners of the earth. You can view the vivid photos by clicking on the thumbnails […]