https://www.omnidex.com/docs/v54/ 2026-04-29T18:19:32+0000 https://www.omnidex.com/docs/v54/ https://www.omnidex.com/docs/v54/lib/tpl/simple/images/favicon.ico text/html 2016-06-28T22:38:51+0000 Anonymous (anonymous@undisclosed.example.com) https://www.omnidex.com/docs/v54/doku.php?id=admin:features:geo:home&rev=1467153531&do=diff Administration: Omnidex Features Geographic Searches Overview | Latitude and Longitude | Radius Distance Searches | Indexing | Optimization ---------- Overview In today’s world of Internet applications, more and more sites are offering features involving geography. For example, many sites will show you their stores, branches or franchises located on a map. “Yellow Pages” sites allow searches for all businesses, branches or individuals within a certain distance of a location. List fulfill… text/html 2016-06-28T22:38:51+0000 Anonymous (anonymous@undisclosed.example.com) https://www.omnidex.com/docs/v54/doku.php?id=admin:features:geo:indexing&rev=1467153531&do=diff Administration: Omnidex Features Geographic Searches Overview | Latitude and Longitude | Radius Distance Searches | Indexing | Optimization ---------- Declaring Geographic Coordinates Geographic coordinates are first declared in the Omnidex Environment File. The latitude and longitude must be stored in separate columns so that they can be differentiated. Each column is identified using a USAGE clause which describes the content of the column. Latitude and longitude may be stored in any o… text/html 2016-06-28T22:38:51+0000 Anonymous (anonymous@undisclosed.example.com) https://www.omnidex.com/docs/v54/doku.php?id=admin:features:geo:latlong&rev=1467153531&do=diff Administration: Omnidex Features Geographic Searches Overview | Latitude and Longitude | Radius Distance Searches | Indexing | Optimization ---------- Latitude and Longitude The universal method of identifying a location is by geographic coordinates, specifically latitude and longitude. Latitude measures the distance north and south, with the Equator being the central latitude. Longitude measures the distance east and west, with the Prime Meridian being the central longitude. A set of la… text/html 2016-06-28T22:38:51+0000 Anonymous (anonymous@undisclosed.example.com) https://www.omnidex.com/docs/v54/doku.php?id=admin:features:geo:math&rev=1467153531&do=diff Administration: Omnidex Features Geographic Searches Back to Geographic Searches ---------- The Math Behind Geographic Searches The math behind radius searches is somewhat complex but interesting, and there are several possible approaches. Why not use ranges of latitude and longitude? text/html 2016-06-28T22:38:51+0000 Anonymous (anonymous@undisclosed.example.com) https://www.omnidex.com/docs/v54/doku.php?id=admin:features:geo:optimization&rev=1467153531&do=diff Administration: Omnidex Features Geographic Searches Overview | Latitude and Longitude | Radius Distance Searches | Indexing | Optimization ---------- Optimizing Geographic Searches Geographic searches are specified using a $DISTANCE function. As long as there is a multi-column Omnidex index containing the latitude and longitude, the $distance function will be automatically optimized. text/html 2016-06-28T22:38:51+0000 Anonymous (anonymous@undisclosed.example.com) https://www.omnidex.com/docs/v54/doku.php?id=admin:features:geo:radius&rev=1467153531&do=diff Administration: Omnidex Features Geographic Searches Overview | Latitude and Longitude | Radius Distance Searches | Indexing | Optimization ---------- Radius Distance Searches The most common geographic search is the radius distance search. This search simply says, “What is within five miles of me?”, meaning what is within a circle where I am standing in the center of the circle, and the circle is a radius of five miles around me. Omnidex supports radius distance searches using a wide var…