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admin:features:geo:home [2011/01/10 23:42]
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admin:features:geo:home [2016/06/28 22:38]
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-====== Administration:​ Omnidex Features ====== 
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-===== Geographic Searches ===== 
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-**[[admin:​features:​geo:​home|Overview]]** -> [[admin:​features:​geo:​latlong|Latitude and Longitude]] -> [[admin:​features:​geo:​radius|Radius Distance Searches]] -> [[admin:​features:​geo:​indexing|Indexing]] -> [[admin:​features:​geo:​optimization|Optimization]] 
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-==== Overview ==== 
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-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 fulfillment sites allow people to do mailings for all people within a certain distance of a location, such as the centroid of zip code.  ​ 
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-To support these types of searches, Omnidex provides the capability to report and search based on distances from geographic coordinates. ​ These searches are possible using some simple Omnidex indexes paired with a [[dev:​sql:​functions:​distance|$DISTANCE function]] available in SQL SELECT statements. ​ This function reports the distance between two sets of coordinates,​ and can also be used in criteria to select rows that meet distance requirements.  ​ 
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-Current implementations of relational databases provide some support for distance calculations;​ however, these can be complex and costly. ​ Some database requiring that the developer code trigonometric functions in stored procedures. ​ Some databases do not use indexes to speed these searches. ​ Some databases charge separately for this feature. ​ Omnidex provides this capability in the base product. 
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-====  ==== 
-**[[admin:​features:​geo:​latlong|Next]]** 
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-====== Additional Resources ====== 
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-See also: 
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-  * [[admin:​optimization:​home|Optimization Strategies]] 
-  * [[admin:​features:​geo:​math|The Math Behind Geographic Searches]] 
-  * [[dev:​sql:​functions:​distance|$DISTANCE function]] 
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admin/features/geo/home.txt · Last modified: 2016/06/28 22:38 (external edit)