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@@ -0,0 +1,59 @@ +=============== +osm@spline Xapi +=============== + +Aim +============ + +We like to rewrite some parts of the XApi needed for our own application. Our +aim is not get a full implementation of the Xapi, but to answer only specific +requests, at low latency. For this subset of Xapi we want completly cover the +original api. + +Requests +============= + +This is a list of example requests, we want to optimize. + +* xapi.spline.de/api/0.6/node[amenity=*] +* xapi.spline.de/api/0.6/node[highway=busstop] +* xapi.spline.de/api/0.6/node[bbox=-6,50,2,61] +* xapi.spline.de/api/0.6/node[amenity=hospital][bbox=-6,50,2,61] + +a more formal description +------------------------- + +We serve the node endpoint, but no others. We implment the tag based filtering, +for only one tag and a bounding box. + +database shema +================ + +We keep data in a highly specioaliced shema, that allows us to prevent tables +growing to big. And supports our requests at maximum speed. + +| CREATE TABLE <tagname>:<tagvalue> ( +| {bigint id} +| {longitude float4}, +| {latitude float4}, +| {object varchar} +| ) PRIMARY KEY id; + +Implmentation +============= + +Teilprobleme: +.............. + +1. Database import + +mögliche Technologien: +* Osmosis- plugin +* selbst in python (Protobuf consumer, async pgsql schreiber) + + +2. Web API +.............. + +mögliche Technologien: +* node.js |