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icecondor [2008/10/03 00:05] hadoop
icecondor [2016/06/25 11:25]
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-IceCondor: Open Source Location Broker 
-See [[icecondor:usecases]] \\ 
-See [[icecondor:API]] \\ 
-See [[icecondor:location]] \\ 
-See [[icecondor:androidclient]]  
-== terms == 
-A point location is defined by lat/long/altitude. 
-An area location or polygon is defined by 3 or more point locations. 
-A track point is a point location or area location plus a time. 
-A 3d polygon? 
-== accuracy estimate == 
-The openmoko app, tangogps, introduced me to a new GPS concept - Horizontal/Vertial Dilution of Precision.  the V-DOP/H-DOP value will help generate an an accuracy estimate. A high VDOP means a low accuracy so take a larger area and low confidence as the object's location. The location record will store a range in meters, centered on the given lat/long that gives a confidence to the location. 
-== search  == 
-build a set of filters from the following. use a filter language/DSL? 
-  * geo - location, radius 
-  * geo - polygon (set of points) 
-  * object type - person, business, event 
-  * record creation date 
-  * user id 
-== publish/subscribe == 
-I want to be notified when the results of a search are positive, or have result count of X. examples: 
-  * user A moves into/outof polygon B (in 3D space, could be in an elevator etc) 
-  * a filter set for polygon A results in X or more objects (eg. favorite bar has 4 or more friends) 
-A list of notification triggers would be managed. 
-== clients == 
-  * unix command line 
-  * unix daemon 
-  * android app (see [[dotcom:androidsociallocationnetwork]]) 
-  * web site 
-== technology == 
-language possibilities:  
-  * erlang 
-  * ruby 
-  * postgresql + postGIS extension 
-access protocols: 
-  * HTML 
-  * XMPP 
-== URLs == 
-object being tracked: /object/<name> \\ 
-track point: /trackpoint/<guid> 
-== possible directions == 
-Distributed. Each IceCondor installation (node) uses a distributed hash table to store location records. Nodes can be added to the network easily and once added, its data is searchable by any other node. Using a DHT for storage would loose the benefits of postGIS for lat/long queries. Hadoop? 
icecondor.txt ยท Last modified: 2016/06/25 11:25 (external edit)