C—lA

Topographical Mapping In the Rotorua-Taupo region a start has been made in mapping the areas required for national development projects. Although it is hoped that urgent requirements will be covered, shortage of staff will delay progress during 1949. Maps published during the year include some sheets on which work was completed in the previous year. The summary of maps published to date is as follows:

1:25,000 series

1:63,360 series

Aerial Photography The services of N.Z. Aerial Mapping, Ltd., Hastings, have been fully employed during the year on the production of aerial photographs for all State Departments. This company still maintains a high standard of production and is now engaged in filling in photographic coverage of more difficult terrain where suitable weather conditions are limited. During the year the company photographed an area of 7,237 square miles, mostly on a basic scale of 4 in. to l mile. Since the company commenced operations under contract in 1939, an area of 52,700 square miles has been covered with vertical aerial photographs. Mosaic Maps To make fuller use of existing photography, a start has been made on the production of mosaic maps (N.Z.M.S. 3, 1 :15,840 and N.Z.M.S. 4, 1 : 25,000). These maps, particularly in areas not covered by topographical maps, will greatly assist in the study of lands for development purposes. During the year 24 sheets have been published, and it is anticipated that 100 sheets will be published in the year 1949-50. These maps are being produced by N.Z. Aerial Mapping, Ltd., under contract to this Department.

9

Area (Square Number of Miles). Sheets. Maps published at 31st March, 1948 1,070 35 Maps published during year 58 2 Mapping in hand 1,130 29 2,258 66

North Island. South Island. Total. Area (Square Number of Area (Square Number of Area (Square Number of Miles). Sheets. Miles). Sheets. Miles). Sheets. Published at 31st March, 1948 18,908 73 27,598 87 46,506 160 Published during year 300 2 436 1 736 3 Drawings completed 500 o 500 2 Mapping in hand 3,800 ' 15 1,800 ! 5 5,600 20 23,508 92 29,834 93 53,342 185