Oracle Spatial - LRS component

Question

Hello,
I am working as a consultant for a transportation department for building Highway Database Management system .Transportation department uses several Linear Referncing Methods such as Milepoint, Station, Refrence Marker etc to locate an attribute on a route . I am new to Oracle - LRS but have heared that by implementing Oracle-LRS , it can locate route attribute and events by one measure and not with x and y coordinate. Does anyone have implemented Oracle-LRS , if so I would like to know how can I design my dastabase based on LRS.
What other problems Oracle LRS can solve in my case ?
I will appreciate if some one can pass me design code etc to look into.
Thank you.
Suhail

Answer 1

Thanks for your advice . I donot have 9i but hope to get very soon, I will give a shot then . One more thing which you mentioned in your previous answer is that one has to write extensive PL/SQL code to use LRS. In my case , I have a simple table of roads and would like to clip a segment of road dynamically and then based on the result I would like to fetch some data from other tables . But I lost here, because I donot have a way to relate data in the other table. I have a simple table say routes to store road geometry and in other route_features table I am storing road features ( attribute of the table is rc_id (pk),route_id_fk,feature_id_fk,feature_value,begin_milepoint,end_milepoint. Both tables are related with one key ie ROUTE_ID .I want to clip a segment of route from first table and then would like to get the data from the second table. I have no idea how I can accomplish this in PL/SQL. Here is my code what I am trying to do
SQL> SELECT SDO_LRS.CLIP_GEOM_SEGMENT(route_geometry, 15, 30)
2 FROM routes WHERE route_id = 1;
SDO_LRS.CLIP_GEOM_SEGMENT(ROUTE_GEOMETRY,5,10)(SDO_GTYPE, SDO_SRID, SDO_POINT(X,
SDO_GEOMETRY(3302, NULL, NULL, SDO_ELEM_INFO_ARRAY(1, 2, 1), SDO_ORDINATE_ARRAY(
5, 4, 5, 8, 4, 8, 10, 4, 10))
Now in the above result I have the output which is based on x,y,m . How I can use this to get feature_id_fk,feature_value data from teh second table? This is what you mentioned that requires lotof Pl/SQL programming. Could you share soem code here how to accomplis my task.
I will appreciate your input.
Thank you.
Suhail