Territory Stories

Pine Creek region surface water resources assessment Vol 1 - Study report Vol 2 - Geotechnical report

Details:

Title

Pine Creek region surface water resources assessment Vol 1 - Study report Vol 2 - Geotechnical report

Creator

Willing & Partners; Dames & Moore; Earl James & Associates

Collection

E-Publications; E-Books; PublicationNT; Report no. 55/1989

Date

1989-08-01

Notes

Date:1989-08

Language

English

Publisher name

Northern Territory Government

Place of publication

Darwin

Series

Report no. 55/1989

File type

application/pdf

Use

Attribution International 4.0 (CC BY 4.0)

Copyright owner

Northern Territory Government

License

https://creativecommons.org/licenses/by/4.0/

Parent handle

https://hdl.handle.net/10070/229295

Citation address

https://hdl.handle.net/10070/673141

Page content

Technical Report WRD89055 Viewed at 15:07:05 on 29/07/2010 Page 25 of 45. > >8 MAPPING OF FINAL SITES The mapping of the final sites was carried out using 1:25000 wide angle photography exposed during 1974 & 1975. The control for this mapping was obtained from two sources - one being from field survey and the other from photogramrnetric derivation. The photogrammetric derivation entailed transferring control from high-level Army photography on to the 1:25000 photography that was used. Sites 2,4,14,23 & 24 were mapped using this method. All the field survey control was carried out using unclosed traverses and trig heighting. Formline contours at 2.5 metre intervals and drainage were depicted on the plots. It is necessary to refer to the preliminary mapping for up-ta-date detail as there is some detail missing from the 1 :25000 photography due to its age. Ink plots were produced at 1 :5000, 1: 10000 or 1:20000, depending on the size of the storage. The accuracy of these plots would be in the order of +25 metres horizontally and 1.5 metres vertically for the formline contours and +0.5 metre for spot heights. The vertical datum has been derived to approximate AHD but its accuracy has not been determined. On two sites the area exceeds the expected catchment, hence additional mapping had to be carried out from the higher level photography. The mapping in these areas is of similar accuracy to the preliminary mapping. Mapping of the fmal sites are presented as Figures 10.1 to 10.9, Volume 2. PINE CREEK REGION - SURFACE WATER RESOURCES ASSESSMENT Page 16