Attribute data can be defined as non-spatial data that describes the spatial object or phenomena. Matching spatial data with attribute data is a principal part of a Geographic Information System (G.I.S).
For this tutorial, we use a sample of spatial and attribute data gotten from mapping of Telecom masts. The spatial data made up of the X and Y coordinates of the Telecom masts is stored in the shape file .shp format while the non-spatial data or attributes are in a .csv table. The table contains columns and rows attributed with information about the Telecom masts surveyed- Owner, Height above ground, Mast Id no and Pt No. The intention of this post is to a query the attributes of the Telecom masts for the number of Telecom masts that are owned by MTN which are over 20m in height above ground.
Performing queries allows us to retrieve valuable information from the data that we captured, processed and assembled. Performing this queries in a GIS allows us to tie location to the result of the query. We shared a link to a document titled ‘Selection by Attributes’ showing the steps taken to execute a typical Selection by Attributes task with ArcMap 10.2. The spatial data in shape file .shp format and Attribute Table in comma separated values .csv format.
No comments:
Post a Comment