How is GIS used when collecting and recording data?

Question 1

GIS stands for

Answer 1

geographic information systems

a tool for recording, organisisng, displaying and analysing geographic spatial information

Question 2

what can it be used for in investigations?

Answer 2

• plan locations:take photos to look at access
• collect data:make notes in the field and pinpoint to exact locations
• record data: make notes/take photos, record longitude and latitude
• present data: create layers of info over base map

Question 3

two formats of data

Answer 3

1) raster data

2) vector data

Question 4

raster data

Answer 4

digital images represented in grids

Question 5

vector data

Answer 5

layers of geometric shapes e.g lines, points and polygons

Question 6

How useful is GIS in data collecting/recording? (6 things)

Answer 6

1) used in the field to measure and record info linked to specific points
2) data loggers can immediately upload data to maps
3) it measures distance in straight lines over large distances
4) secondary data can be imported to maps e.g. photographs
5) different base maps can be used to offer reasons why data may not have been collected in an area
6) data is tied to an exact location

Question 7

apps that use GIS

Answer 7

• ArcGIS
• iGeology
• FieldAssets

Question 8

Adavantages

Answer 8

• saves time
• adjustable scale
• add/remove layers
• gives exact locations
• handle large amounts of data

Question 9

Disadvantges

Answer 9

• costly
• not always simple to use/work
• not accessible to everyone
• vulnerable to software failures