Surveying and mapping Flashcards
What is accuracy in mapping?
Accuracy is the degree to which the result of a measurement conforms to the correct value or standard.
How do you check that your instruments are accurate/calibrated?
Instruments are regularly checked against known standards.
What is GIS?
Geographic Information System mapping, uses software to create, manage, analyse, and visualize data related to locations.
What is HMLR Practice Guide 40: supplement 1?
Describes the origins and scales of Ordnance Survey mapping and how this relates to plans prepared by HM Land Registry.
What is GPS?
Global Positioning System (GPS) is a network of satellites and receiving devices used to determine the location of something on Earth.
What is a map?
A two-dimensional, symbolic representation of selected characteristics of a place.
What are the main map scales used for HM Land Registry Plans?
1:1250, 1:2500.
What is the application of the scale 1:1250?
Title Plan preparation.
What is the Ordinance Survey?
A national mapping agency, responsible for creating, maintaining, and distributing detailed location information.
What digital mapping software have you used?
Promap and QGIS.
What are the advantages of using digital mapping?
Enhanced accuracy, real-time data integration, ease of access, and the ability to facilitate collaboration and spatial analysis.
Where are OS maps generally used in your scope of work?
Grazing plans, RAMS plans, steading plans.
Tell me about a type of map you use in your role.
OS Mastermap, OS Vector map.
What is a red line plan?
A red line plan, in the context of planning applications, is a location plan that clearly outlines the boundaries of the site for which the application is made.
What other colours might you find on a map?
Yellow.
What is a title plan?
A graphical representation, based on Ordnance Survey mapping, that shows the boundaries and location of a property’s land as registered with the Land Registry.
What is a raster map?
An electronic map image made up of a set number of pixels. You can’t manipulate the information.
What is a vector map?
A map using geometric shapes (points, lines, and polygons) and mathematical equations, rather than pixels like raster maps.
What is the OS MasterMap?
A national topographic database, maintained by Ordnance Survey, that provides detailed and accurate geographic information including features like buildings, roads, land use, and terrain.
What is a topography layer?
The three-dimensional arrangement of physical attributes (such as shape, height, and depth) of a land surface.
What is OS VectorMap Local?
Fences, building outlines, paths and street names, for the accurate lie of the land. A simple vector dataset at a nominal scale of 1:10000.
Do OS Maps show legal boundaries?
No.
Why is it important that maps are accurate?
The accuracy of measured surveys directly influences the success of construction projects, helping to avoid cost increases, project delays, and legal issues.
Tell me briefly about your understanding of licensing in relation to mapping.
The creation and use of title plans are part of the Land Registry’s function and are not subject to any licensing or approval process.
Explain the key principles of the RICS Professional Standard Boundaries 4th Edition.
Ethical conduct, competence, and good practice in boundary identification and dispute resolution, focusing on outcomes and promoting mediation.
What RICS guidance relates to the measurement of land?
Measurement of Land for Planning and Development Purposes.
Who should apply this guidance in practice?
RICS members, wherever feasible, carry out a physical inspection.
What are the uses of aerial photography?
Land use, history of a site etc.
What do you understand from the RICS Professional Standard Earth Observation and Aerial Surveys 6th Edition?
Provides guidance for land and environmental professionals on capturing data about the Earth’s physical, chemical, and biological systems, including aerial surveys and earth observation techniques.
How have you explained complex mapping issues to clients?
Clear communication about the importance of retaining access to the back of their property after splitting it, which included a cottage that could impact vehicle access.
What advice did you give in respect of the LR compliant mapping?
The plan must be drawn accurately to a stated scale (1:1250, 1:2500), include a north point orientation, and show sufficient detail of surroundings.
Talk through any anomalies identified from your inspection.
What anomaly did you identify during your inspection?
The OS Mastermap line was inaccurate compared to physical reality but was not in conflict with other titles.
How did your inspection inform the advice you gave?
Accurate measuring of physical reality.
Describe one of the properties you mapped as part of the sale.
Nether Rusko - confirm with client extend of property to sale, including loting and servitude access to the steading
What advice did you give regarding plans for splitting titles?
Be clear about implications and ensure the client has considered potential impacts to be satisfied with the new boundary between the titles and rights of way required.
How did technology influence the advice provided?
Used peat rod to measure peat depth, planned route, and broke it into 50m x 50m grids using GPS to record measurement points. Exported GPS data to QGIS to create a peat map.
What were the limitations of the technology?
The UK Forestry Standard generally prohibits new forests on soils with peat exceeding 50 cm in depth.
What was the extent of the area measured that could not be planted?
25 acres that could not be planted.
How did this impact the client’s woodland planting objectives?
Reduced total planting area; advised that peat restoration options and funding could be looked into.
What funding options were suggested for peat restoration?
Peatland ACTION funding such as ditch blocking.
What does the OS Vectormap show?
Contours of landscape and water courses and sources, vital for creating RAMS maps.
What is the buffer zone requirement within 50m of a spring?
Slurry cannot be spread within this zone.
What is the proximity requirement for ditches, burns, rivers, lochs, or wetlands?
10m of any ditch, burn, river, loch or wetland.
What slope gradient requires a buffer zone to protect the watercourse?
Steeply sloping land with slopes in excess of a 12° gradient (1 in 5).
What soil condition is noted for RAMS maps?
Shallow soils with an average depth of less than 40cm and overlies gravel or fissured rock.
What areas are excluded from RAMS maps due to management agreements?
Any areas with separate management agreements such as SSSI and agri-environment schemes.
What types of land are noted as unsuitable for spreading?
Wooded land, steading areas, farm roads and yards.
What key annual records must be kept for NVZ compliance?
RAMS Map, cropping details for each field, NMax calculation, dates and quantities of fertiliser applied, details of livestock, imports and exports of organic manure, calculation of storage capacity for slurry and poultry manure, location of field middens, inventory of manufactured fertilizer.
What is the purpose of the 4-point plan?
Ensuring good agricultural practice.
How should copyright be acknowledged when publishing maps?
“© Crown copyright and database rights “year” Ordnance Survey, where “year” is the current year.
