Surveying and Mapping Flashcards
What is important when using images / drawings / plans / maps?
- Accurate
- Up to date
What scale is a location plan?
1:1250 or 1:2500
What scale is a site plan?
1:200 or 1:100
What scale is a drawing?
1:100 or 1:50
What scale is a room plan?
1:50 or 1:20
What scale is a detailed drawing / component?
1:10 or 1:5 or 1:2
What is Land Registry?
- All land must be registered if sold / mortgaged
- All leases must be registered if lease is over 7 years old
What legislation is relevant to Land Registry?
The Land Registration Act (2002)
What is a title register?
Document containing:
- Title reference number
- Ownership
- Easements (rights of land over another - for utilities for example)
- Price paid
- Rights of way over property
- Mortgage
- Freehold / leasehold
What is a title plan?
Shows location and red line boundary (simple)
What else can you view on land registry?
- Deeds e.g. leases / charges
What is the key guidance on surveying and mapping?
RICS Professional Standard: Measured Surveys of Land, Buildings and Utilities (3rd Ed. 2014)
What are Earth Observational Surveys?
Process of capturing data about the Earth’s physical, chemical and biological systems using remote sensing technologies including surveying techniques
What is the role of GIS in land and surveying?
Geographic Information System
Hardware and Software that stores, manages, analyses and visualises geographic data
You layer your data, survey data, water features, boundaries, addresses, transportation, elevation, and images to create a GIS model
What is a topographical surveying / land survey?
Shows property, area of land, define boundary (black and white)
What surveys would you typically look at in a development?
Pre-Construction:
- Topographical survey / land survey
- Geotechnical survey / ground investigations
- Bathymetry survey
- Ecology survey
- Tree survey
- Underground utilities survey
- UXO survey
Assessments:
- EIA
- Flood risk assessment
- Traffic impact assessment
- Historical buildings assessment
Redevelopment:
- Structural survey (for redevelopment)
- Asbestos survey (if building built or refurbished before 2000)
What is a CAD drawing?
Computer-aided design
Digitally create 2D drawings and 3D models of real-world products before they are manufactured e.g. technical architectural drawings
Typically use AutoCAD for architectural drawings
What is a Revit model?
Used to model structures in 3D
What is a geotechnical survey?
Tests physical properties of soil earthworks and foundations for proposed structures
What is a bathymetry survey?
Type of hydrographic survey which map out details of underwater terrain, illustrating depth and land that lies underneath the water
What does the RICS Professional Standard: Measured Surveys of Land, Buildings and Utilities (3rd Ed. 2014) set out?
Information on:
- Project information
- Survey accuracy, control, coordinate grid and datum
- Topographical surveys
- Measured building surveys
- Underground utility surveys
- Monitoring and deformation
- Deliverables
What is GNSS?
Global Navigation Satellite System e.g. GPS
Under GIS, what are the types of data?
Vector Data - Points, lines and polygons with vertices (e.g. administrative boundaries are polygons, while fire hydrants would be a point, roads are line data)
Raster Grids (grid data) - Satellite images, aerial images, digital elevation models
Visualisation data - locations on a map (choropleth maps use colour, heat maps use shading, isoline maps use lines)
GIS data - Use to find find meaningful information from data e.g. shortest route to work
What is included in a topographical survey?
- Get existing conditions of ground
- Used to decide what to do with land, e.g. development
- Look at above ground features and utilities underneath
- Remote sense data, 3D scans, drones can be used to collect data (data from range of sources)
