Details: Project Overview

This project involves the large-scale digitization of more than 200,000 residential structures using high-resolution UAV-derived orthophoto as the base reference. The objective is to develop a high-accuracy, topology-compliant building footprint database suitable for GIS-based planning, analytics, taxation systems, and enterprise geospatial integration.

All digitization will be performed on georeferenced orthomosaic imagery to ensure high positional accuracy and precise boundary delineation. Each structure shall be manually interpreted and digitized to generate accurate polygon geometries aligned with rooftop extents.

Scope of Work

The selected vendor shall be responsible for:

High-precision building footprint digitization
Polygon creation aligned with rooftop boundaries
Strict topology enforcement (no gaps, overlaps, slivers)
Accurate snapping between adjacent structures
Ward-wise dataset segmentation
Attribute structuring and naming standardization
Multi-level quality control and validation


Technical Requirements
Digitization must be performed strictly on georeferenced orthophoto
Polygon boundaries must match rooftop edges precisely
Proper snapping must be ensured across all adjacent features
No gaps, overlaps, or invalid geometries are permitted
All geometries must be valid and error-free
Uniform digitization standards must be maintained across all wards
Consistent Coordinate Reference System (CRS) must be used


Data Structuring
Data must be organized on a ward-wise basis
Each ward must be delivered as a separate dataset
Standard naming conventions must be followed
Attribute schema must remain consistent


Deliverables
Building footprint dataset (200,000+ polygons)
Ward-wise segmented datasets
Shapefile (.shp) format
GeoJSON (.geojson) format
Topology-validated, GIS-ready data
Quality Control & Validation

The vendor must ensure:

No gaps, overlaps, or sliver polygons
Proper snapping across all features
No self-intersections or duplicate geometries
Visual alignment with orthophoto

Client reserves full rights to validate, reject, or request corrections.

Terms & Conditions: Mandatory Technical Evaluation
Submission of minimum one complete ward dataset is compulsory
Evaluation will be based on:
Digitization accuracy
Topology compliance
Snapping precision
Data consistency

Only technically qualified vendors will proceed further.
Access to full project data will be granted only after qualification.

Payment Terms
Payment will be released only for approved datasets
Rejected or non-compliant data will not be considered for payment
Payments may be processed in ward-wise milestones

Rejection & Penalty Clause
Any dataset failing quality standards after two revision cycles may be rejected
No payment will be made for rejected datasets
Continuous poor performance may lead to termination of work allocation

Data Confidentiality
All data is strictly confidential
Vendor shall not share, reuse, or distribute data
Legal action may be taken in case of violation

Ownership

All final deliverables will be the sole property of the client.

Timeline
The project must be completed within 30 days after allocation of work.
Strict adherence to milestones is mandatory

Eligibility Criteria: Experience in GIS digitization / UAV mapping
Capability to handle large datasets (200K+ features)
Access to QGIS / ArcGIS
Skilled GIS team
Mandatory submission of 1 ward sample, the dataset will be provided after bid submission.