Mapping Flashcards
- What are the two mediums of maps
Raster and vector maps
- What is GIS
Geographic Information System
- What does GIS do ?
is a system designed to capture, store, manipulate, analyse, manage, and present all types of geographical data
- What is raster
A raster title plan is an electronically stored image of what was a paper title plan.
Raster data can be thought of as being similar to a digital photograph. The entire area of the map is subdivided into a grid of tiny cells, or pixels. A value is stored in each of these cells to represent the nature of whatever is present at the corresponding location on the ground.
The major use of raster data involves storing map information as digital images, in which the cell values relate to the pixel colors of the image. To reproduce the image the computer reads each of these cell values one by one and applies them to the pixels on the screen.
- What is a vector plan ?
A vector title plan is produced by our computer mapping system and all newly created title plans are done this way. The vector title plan is electronically created and stored and is ‘intelligent’
A vector map, like OS MasterMap, is basically a database of points, lines and polygons which collectively make up all the features on the map. It’s possible to assign each of these features extra information – perhaps demographic data and the age of the buildings for example
- What must be included on all plans
A north point
Red line outline
Scale
- What is difference between a plan and a map ?
A plan uses a smaller scale and a plan is a true scale representation. Whereas a map is drawn at a scale that features cannot be seen.
- What are the scales for a site plan, location plan
Site plan – 1:100, 1:200 and 1:500
Location plan 1:1250 and 1:2500
- What is the typical scale for a room and building:
Room: 1:50
Building Plan: 1:100
- What is the typical accuracy of an OS MAP
Generally within one metre of accuracy
- What act relates to the registration of land/ property ?
Land registration Act 2002
- What does a plan need to have to be land registry compliant ?
- Has been drawn accurately to a stated scale
- 1:1250 – 1:500 for urban properties
- 1:2500 for rural properties (fields and farms etc)
- Shows its orientation (for example, a north point)
- Not marked as “for identification only” or similar wording
- Clarifies its general location by showing roads, road junctions or other landmarks
- shows sufficient detail to be identified on the Ordnance Survey map
- Includes a bar scale
- the whole of the property including any garage, parking space, bin store or garden ground.
- buildings in their correct (or intended) position.
- access drives or pathways if they form part of property boundaries.
- undefined boundaries accurately and where necessary, by reference to measurements.
- measurements in metres to 2 decimal places.
- land and property clearly (for example by edging, colouring, stippling or hatching) - the edging/colouring must not obscure any other detail.
- all colours referred to in the deed, with their extents clearly defined.
What is a GOAD plan ?
Is a detailed street map which identifies the uses and occupiers of individual buildings. Key location factors such as pedestrian zones, road crossings, bus stops and car parks are included. These plans are normally used in the commercial and retail industry to establish the site quality of existing or prospective locations
how does a topographical survey help you to assess the opportunity on a plot?
A topographic survey gathers data about the natural and man-made features of the land, as well as its terrain. Permanent features such as buildings, fences, trees and streams accurately define the ground and its boundaries. Land contours and spot levels show the elevation of the terrain. Topographic maps are used by architects, engineers, building contractors and others to accurately visualise their sites and help bring forward development.
