MAPPING IN NEW ZEALAND SINCE 1931 1931 - Survgrid

1931Bob Crawford’saerial mappingexperimentusing a Barr &Stroudtopographicalstereoscopeand Air Forcephotography

The Barr & Stroud Z.D.4 Armytypetopographical stereoscope.Designed for field use it folds to fit into its ownDesigned for field use, it folds to fit into its owncanvas carry-case

N.134 -- 1st first Provisional NZMS 1 sheet – begun 1936, published 1939

A Draughtsman’s Dream of Aerial Surveys –A Draughtsman s Dream of Aerial Surveysby Gordon Redward

All of the following instruments, untilthe arrival of the Multiplex, combineda mirror stereoscope with a parallaxmeasuring device. When readingheights or drawing contours,correction graphs had to be used tocompensate for the effects of tilt inthe photos.The instruments were used only forreading spot heights and contouring.Stream patterns and cultural detailwere established using the Arundelmethod of radial line plotting.

Measuringheights witha parallaxbar

1935Barr & Stroud ZD10 precision stereoscope.

1938 - Barr & Stroud ZD15 Precision Stereoscope

The Cambridge Stereocomparator –The Cambridge Stereocomparator“Dora” --- arrived 1941

Abrams Contour Finder donated by USMarines in 1943, adapted by Branch staff bythe addition of a draughting machine arm.

The ‘Bitsa’ – put together by staff member Russell Lyon.Pantograph settings had to be altered for each change inelevation.

The photographer The bridegroomAerial Mapping & Computing Branches celebrate the occasionof the wedding of Doug Francis in England – February 1944

The members of staff and visitors who celebratedthe occasion of the marriage of Doug Francis26 February 1944From left: Dave Dyett, Laurie Lee (Chief Computer, 1964-74),George Railton (Chief Photogrammetrist 1946-61), CherieFrancis (Doug’s sister), Madge Pirritt, Joe Reid (ChiefDraughtsman, Auckland 1967-69), Fran Tindall, Fred Jennings(Chief Computer 1940-46, Inspecting Draughtsman 1946-60),Ruby Hall, Bill Cree (Chief {Photogrammetrist t t 1961-1972), 1972)Gerry O’Neill, Russell Lyon (Inspecting Draughtsman 1960-69),Holmes “Bob” Miller (knighted in 1979 for services to Antarctica,Surveying & Conservation), Bob Crawford (NZ’s pioneer ofphotogrammetry), Wally Panton, Ray “Curly” Owen (ChiefComputer 1946-64)’Inset: Bob Barrett (Chief Photogrammetrist 1972-1982), DougFrancis (Chief Cartographer 1962-69, Supervising Draughtsman1969-76. Director [Mapping] 1976-1979)

A bit of an entanglement -- the string puzzle challenges‘Slide’ Bannister & Judy Blackburn

The beginnings of the Photo Laboratory –Lyndsay Foster & Bob Barrett trim ‘miniprints’--- aerial photographs h reduced d to an inch to a mile

Aerial Survey Branch at work – c.1946State Fire BuildingColin Pell, ‘Slide’ Bannister, Gerry O’Neill,Doug Francis, George Railton

Xmas1946

The young women of 1947Joan Matthews, Pat Oliver…… Gifford, Lyndsay Clifford, Noeleen Roe

Xmas1947

The DPLMultiplex --constructedduring WW2 atthe DSIR’sDominionPhysicalLaboratoryInitial deli erInitial deliveryof 3 projectors

The Multiplex was the first pieceof Branch equipment designed tocompensate for the effects of tiltin the photography p and to allowthe direct drawing of true-to-scaledetail and contours.In the previous instruments, tiltcorrection graphs had to beprepared for each overlappingpair of photographs.

Diagrammaticrepresentationof Multiplexmodel

AnaglyphprojectiononMultiplex

The men of 1948 at tea break—Wilf Watson, Jack McMahon, Unknown, Neil Allardice, RayOwen, Doug Francis, ‘Ginna’ Whitcombe, George Railton

1948 -- Fair Isle’s in fashion!Bob Barrett & Neil Allardice

1948 - Wild A6 161 – bought by NZ Forest1948 - Wild A6 161 – bought by NZ ForestService to provide their logging base maps