Introduction to Geotagging

A few cameras have a GPS device built into them and record the geoposition of the camera when a photo is taken. These coordinates are recorded along with many of the camera and photo attributes in a record associated with the photo in a file called the EXIF file. Most cameras create this standard EXIF file but lack the GPS to determine the location of the camera. There are several ways you can use the TNT products, including the FREE TNTlite, to add geotags to your digital photos. A general introduction to this materials is covered in the following Technical Guide.

Introduction to creating geophotos

Creating Geophotos.

If your photos already have a position recorded in the EXIF file for each photo, then the TNT applications described below can use it. However, it is likely you do not have this kind of camera. In this case you can use a calibration procedure to geotag your photos. These procedures include the use of separate GPS log files collected with the images or manually plotting your photo locations. These are described in the following Technical Guides.

              Convert to geophotos using GPS logs

              Convert to geophotos using a script that can be modified

              Plot photo locations to create geophotos

Exploiting Geophotos in a Geospatial System.

Geotagged photos can be viewed superimposed on georefenced maps and images regardless of the map projection or coordinate reference system used for any of these materials.

Pinmap your geophotos

Photo geotags are records in a database, even the photos if you choose. You can choose to query these tables to determine which photos to use, view, pinmap, etc. based on the location and many attributes supplied by the camera photo attribute file (EXIF file).

Pinmap your geophotos using queries

Your geotagged photos can be used with your image and terrain data as billboards in a 3D flying simulation.

Viewing geophotos in 3D simulations

Your geotagged photos can be stored, viewed, and managed as image fields [BLOBs = Binary Large OBjects] in a database table along with all their attributes.

Storing and using geophotos in a database

The name, position, and attributes of a geotagged photo are in records that can be used in a query to determine which photos to use and view.

Selecting geophotos for viewing by their attributes

Geotagged photos in a database can be converted to a georeferenced point file in any coordinate reference system or map projection. This file can then be exported to many popular geospatial data formats.

Convert Geophoto positions to a geospatial layer

[ Press Releases Index ]

©MicroImages, Inc. 2013 Published in the United States of America
11th Floor - Sharp Tower, 206 South 13th Street, Lincoln NE 68508-2010 USA
Business & Sales: (402)477-9554 Support: (402)477-9562 Fax: (402)477-9559
Business info@microimages.com Support support@microimages.com Web webmaster@microimages.com