GIS

Geographic Information System

A Geographic Information System (GIS) is a computer system designed to capture, store, analyse, manage and present all types of spatial or geographical data.  In a general sense, the term describes any information system that integrates, stores, edits, analyses, shares, and displays geographic information.

GIS applications are tools that allow users to create interactive queries (user-created searches), analyse spatial information, edit data in maps and present the results of all these operations.

Our GIS technicians have worked on numerous public transport related projects. We have collaborated with many external partners collecting and amalgamating data from many diverse sources in the production of plans and maps to aid the decision and planning process by our clients.

Our GIS Services include:

  • Manipulating and transforming coordinate systems
  • Manipulating, updating and amending engineering drawings and plans
  • Storing and updating GIS related data (land parcels dataset) using Feature Data Object (FDO) Data Access Technology with AutoCAD Map  and Civil 3D
  • Using and creating GIS format such as SHP files (the most popular geospatial vector data) and SDF (developed by Autodesk)
  • Combine data from diverse sources to create feature rich maps and plans.
  • Rectification and Geo-referencing of photos and scanned maps
  • Asset Data collection
  • Land Terrier
  • Data Cleaning

 

Case Study – GIS Services

Chiltern Railways Transport and Works Act (TWA) Order Bicester to Oxford Improvements

Working alongside Ardent Management Ltd to create the main Chiltern TWA plans, CGD Ltd imported Land Registry  ‘polygon plus’ data using AutoCAD Map 3D. This data provides Land Registry Title boundary information with ownership information attached as ‘object’ data.

Using the GIS capabilities of AutoCAD Map 3D CGD Ltd were able to identify the names and addresses of people with interests in the land being looked at for the above mentioned project. This in turn enabled the surveyors to quickly check that this information was correct.

The GIS enabled us to perform queries and searches on the data to answer specific questions. For example ‘Who owns a particular piece of land?’ or ‘Display land where people have a leasehold interest’.

Using a GIS in this way is beneficial as once the data links have been made it is quick and easy to show any combination of information you want to view. More data can then be linked in to create a more complex GIS.

CGD Ltd UK
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