Tuesday Feb 21, 2012

Merging Geometry boundaries using Oracle spatial

Some times there is a requirement to merge two or more boundaries/borders into one, such as a custom region/territory. For eg. you may need to merge California, Oregon and Washington which are the states that comprise the Western US region. 

In  order to achieve this, I assume that you already have the state boundaries for California, Oregon and Washington. If not, you can get it easily on otn, that includes the standard boundaries. in the world_sample schema. Once you have this information you can use the Oracle Spatial function SDO_AGGR_UNION. Hence, you can combine several standard boundaries into a new region.

Below is an way how you would merge the states mentioned above into a new custom Western US region.

INSERT INTO custom_area SELECT 'Western US', SDO_AGGR_UNION(SDOAGGRTYPE(o.geometry, 0.5)) FROM wom_area WHERE iso_country_code = 'USA' and feature_type = 909996 and name in ('CALIFORNIA', 'OREGON', 'WASHINGTON');

Here, the SDOAGGRTYPE is an object that specifies the geometry column from the spatial table wom_area and the dimensional array.

Create the Geometry columns in Oracle Database

This spatial column that has been created can then be used in Mapviewer tool to plot the stores on the maps, which can then be used in OBIEE analysis.[Read More]
About

This Blog is a platform for discussing the various Oracle BI solutions and how they help the Enterprises to make better decisions.

Search

Archives
« April 2014
SunMonTueWedThuFriSat
  
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
   
       
Today