Step 1: Collection of building floor plans and attributes
We collect indoor building plans and its various attributes are collected from a variety of sources including websites, open forums, blogs and/or by visiting and coordinating with building owners.
Step 2: Building plan and attribute validation
DSPL technical resources visit the building site for validating the floor plans and the attributes. The team collects 5 – 10 geographic coordinates per building using GPS equipment.
Step 3: Digitization of Floor Plan
Subsequently, DSPL in-house teams use appropriate GIS software for digitizing individual buildings on a layer-by-layer basis with reference to floor levels and for various attributes.
Step 4: Geo-referencing and Validation
DSPL technical resources geo-reference and validate the digitized indoor building plans with reference to high-resolution imagery or with respect to the geographic coordinates collected by the field team.
Step 5: Quality check of Indoor maps created
Extensive quality check and error fixing are carried out by DSPL Quality Assurance (QA) professionals for the quality and accuracy of indoor maps. Important points considered during QA/QC of the indoor maps include testing for missing vector layers, duplicate features, dangling errors, overshoots and undershoots.