GIS

Question 1

What is your knowledge, understanding of principles of GIS and systems?

Answer 1

GIS integrates database operations such as query and statistical analysis with unique visualization & geographic analysis offered by maps.

GIS readily converts data between different data models (unlike most database and statistical software).

Question 2

What is GIS?

Answer 2

A way to visualise, manipulate, analyse and display spatial data

Question 3

What does GIS stand for?

Answer 3

Geographical Information System

Question 4

What GIS data structures are there?

Answer 4

Vector - layers containing by points
Raster - grid data
Images - scans of aerial photos

Question 5

How can GIS structures be applied in practice?

Answer 5

They can interact to show multiple layers of data - i.e aerial photography overlayed on a site plan to establish boundary

Question 6

What are some GIS outputs?

Answer 6

Maps is the main one

Also graphs, directions and 3D models

Question 7

What are some GIS inputs

Answer 7

Spatial data

None Spatial data - i.e numbers/text

Question 8

How do you assess data quality?

Answer 8

Check data sources are reliable

Check data transfer does not result in discrepancies

Question 9

How do you analyse data on GIS?

Answer 9

Run spatial analysis query to display relevant key data on overlays

Question 10

What data standards are you aware of?

Answer 10

The Data Standards Authority (DSA) works to improve how the public sector manages data.

Question 11

How would you carry out advanced spatial analysis?

Answer 11

Overlay several layers of base data to show multiple data sources on one plan

Question 12

What do you know about Earth observation and aerial surveys 6th edition global Guidance Note?

Answer 12

It will help clients communicate their goals, and what they expect to receive in terms of:

types of data
accuracy
resolution
survey detail and
final deliverables.

Question 13

How does GIS integrate graphic and text information to provide useful data?

Answer 13

Allows them to be overlayed on one data set

Question 14

How does GIS assist with measuring land?

Answer 14

It enables you to quickly measure large areas without the need to necessarily visit site - other than to confirm boundaries

Question 15

How would you use GIS in property management?

Answer 15

Identify assets under particular department - i.e vacant buildings across large geographical area used for inspection schedules
Used to determine extent of common areas on industrial estates for service charges
Identify areas of ownership for fly-tipping

Question 16

What drawbacks of GIS have you found?

Answer 16

The data accuracy is only as good as the latest update so can’t necessarily rely on the OS map without site investigation

Question 17

Where does GIS obtain its data?

Answer 17

Generally GIS obtains data from maps, for example Ordnance Survey

Question 18

How have you applied query language in relation to database management?

Answer 18

Query data can be applied to a specific search criteria to identify assets recorded on a GIS and display only these.

Question 19

How did you highlight only areas required on GGP?

Answer 19

This was done using a spatial search on data sets

Question 20

How did your client utilise the overlay plan you provided?

Answer 20

They were able to identify vacant buildings over large areas, it was used to inform strategic asset management plans.

Question 21

How did you ensure a query search covered a their portfolio?

Answer 21

The search query related to specific data sets which were downloaded uploaded in spreadsheet form

Question 22

What data would you reply on when distinguishing between freehold and leasehold?

Answer 22

The data was in house records, however I would check deeds for an absolute and titles for a good indication