| Paper
Maps + notebook |
Cheapest
option but details have to be re-entered manually
back at the office.
Pros: Low cost.
Cons: Labour intensive. Laminated
maps overcomes wet weather affects but makes handling
more difficult. Need to be near buildings or other
map features to position accurately. |
| PocketGIS
plus Pocket PC |
Can
transfer large-scale maps from PT-Mapper to a Pocket
PC and set up pre-loaded drop down lists for quickly
recording survey results. Back at the office, tree
positions and records are transferred automatically
into Pear’s software. Prices.
Pros: Excellent entry point for
using IT in the field. Gives fast, convenient surveying.
Cons: Need to be near buildings
or other map features to position accurately. |
| PocketGIS
plus Mobile Mapper |
As
above plus GPS capability and integrated link to
laser rangefinder. With a radio beacon receiver,
gives 1 metre accuracy in open spaces. Data transfers
automatically into Pear’s software. Prices.
Pros: fast, accurate recording
and transfer of data in office. Ideal for large
contracts.
Cons: GPS can be affected by tree
cover and buildings, but laser rangefinder would
then be the tool to use. Cost can probably only
be justified for large contracts. |
| Tablet PC/Ruggedised Laptop. |
Could log straight into PT-Mapper
and Excel ® or Access ® thereby avoiding need for Pocket
PC and data transfer with desktop.
Pros: No data transfer requirements.
Cons: Visibility in bright daylight
and battery life can be major problems. Ruggedised
units essential but carry a heavy price premium
and can be weighty. GPS would need to be in a separate
pack. |
