Creation of Base Map and Digitization of Water Supply Network

For the water supply network of the Paris metropolitan area

Background and Objectives

Magnasoft, as a subcontractor is involved in the digitization of the water supply network for Paris metropolitan area. Magnasoft's partner company is a leading Topography and Geomatics services company in France and the prime vendor of this project.

Key Aspects of the Project

• Creation of base road map with the help of customized tools for data entry and placement/attribution
• Creation of digital map of water supply network using the base road map as reference
  
  

Services Rendered and Methodology

• Organization of general road map data
• The road map is divided into 3 different layers:
  • Base road map containing main roads and road number
  • Objects imported form road features database (BD Topo)
  • Scanned cadastral boundaries/property plates
    
    
• Basic BD Topo Map (Topo database)
  • De-archiving or retrieval of objects from Topo database
  • Topological processing
  • Organization of data before integration
    
    
• Basic Cadastre raster map
  • Scanning of raster plates
  • De-archiving/recovery of coordinates from grid-crosses on plates
  • Coordinate transformation into RGF 93 using CIRCE software
  • Embedding of plates using MicroStation with the module DCARTES using the coordinates calculated with CIRCEms)
• Basic Road Map
  • Data entry of the elements of the road map using MicroStation
  • Development of customized tools for intelligent and controlled data entry
  • Customized interface for data entry of road centerlines, road literals, linking between road numbers and main roads and metadata information
  • Orientation of roadway numbers based on fixed placement rules
  • Digitalization of main roads on basic cadastre raster map with BD Topo as reference
  • Attribution of road code to main roads using the help of the road 'label' tool
  • The tool helps the user in verifying road codes, prevents re-use of road codes, choice of placing permitting compatibility with the automatic increase in size depending on the scale without superimposing the text on the roadway
  • Creation of intelligent road numbers whereby numbers may be labeled either by unitary allocation or all together after digitization; numbers once linked change colour and cannot be reselected
  • Attributes linked to a roadway number are stored in the form of a label that can be continuously verified using the label tool
• Digitization of water supply network
  • Georeferencing of cadastral maps with network lines using the base road map vector data
  • Digitization of water network lines
  • Attribution of network lines and placement of cells

Tools Used:

• MicroStation DCartes
• CIRCE
• BD Topo database
• Customized tools for data entry, placement, and attribution
• ArcView 8.2