C—lA.

Table A.

Table B.

Minor Triangulation. An area of 33,872 acres is returned under this heading, principally in the Hawke's Bay and Nelson Districts. Contoured Topographical Surveys. Small areas under this heading were surveyed in Taranaki and Canterbury. Experiments by means of aerial photography were made during the past year in the Nelson District, but the plotting from the photographs has not yet been completed. Further experiments will be continued during the year. Settlement Surveys. The Crown lands and lands-for-settlement surveys are set out in Table 2 under their appropriate headings for each land district. Native-land Surveys. This work, the greater portion of which was carried out by private surveyors, shows an increase of 104,000 acres, due to the work necessary for the consolidation of Native blocks. Geodetic Triangulation. The progress made this year has been much better than in former years, mainly due to the substitution of luminous signals (lamp and helio) in place of beacons. In all, twenty-one triangulation stations have been observed from, while latitude has been observed at eleven stations wherever weather conditions were favourable and could be taken without delaying horizontal angle measurements, and azimuth observations were made at five selected stations. The summation errors of the fifty-three triangles closed by this year's observations average 1"-13 per triangle, while the average closing-error of the twenty-eight triangles in which luminous signals exclusively were used is 0"-93. The work now connects three bases—Kaingaroa, Wairarapa, and Eltham—by a complete network, and a fourth base —Matamata —will be included in the same network when the observations in its base net are completed. The preliminary computation to fix a geodetic datum is well under way, and this is being utilized in the readjustment of the minor triangulation to bring the latter under a more rigorous control than it has previously had.

2

Class of Work. Area, &c. Average Cost. Total Cost. £ s. d. Minor triangulation, by staff .. .. .. 33,872 acres l-52d. per acre 213 19 10 Contoured topographical, by staff .. .. 236 sq.m. £4-39 per sq. m. 1,037 0 1 Rural, by staff .. .. .. .. 134,672 acres 2-13s. per acre 14,347 15 6 Suburban, by staff .. .. .. .. 2,134 „ 15-38s. „ 1,641 9 1 Town, by staff .. .. .. .. 357 sections £2-20 per section 786 3 2 Town, by private surveyors .. .. .. 14 ,, £5-54 ,, 77 11 7 Native Land Court, by private surveyors .. 142,535 acres 0-70s. per acre 4,986 3 4 Native Land Court, by staff .. .. .. 34,625 „ l-05s. „ 1,816 14 8 Roads, by staff .. .. .. .. 250 miles £25-96 per mile 6,484 14 0 Other work by staff .. .. .. .. .. 6,891 11 0 Total cost of completed work .. .. .. .. 38,283 2 3

Land District. Rural Survey. | Acres. Acres. North Auckland .. .. .. 44,789 1,627 Auckland! .. .. .. .. 16,199 146,431 Gisborne .. .. .. .. 13,579 8,833 Hawke's Bay .. .. .. 2,860 1,734 Taranaki|? .. .. .. . . 1,615 904 Wellington .. .. .. .. 5,474 17,357 Marlborough.. .. .. .. .. 89 Nelson Westland .. .. .. .. 4,341 Canterbury .. .. .. .. 6,124 160 Otago .. .. .. .. 37,783 25 Southland .. .. .. .. 1,908 Totals .. .. 134,672 177,160