Search Textbook

Table of Contents
Foreword
Preface
Glossary

Chapter 1: Introduction

1.7: Tonal Variations Exhibited by Water Surfaces

Figure 1.7a: large-scale photo

Shown on this large-scale photo is the east flowing light-toned Assiniboine River 1 with some spectral reflection in the east 2. Just downstream from the confluence of Chater Creek 3 are the City of Brandon’s sewage lagoons, medium grey-toned 4, except in the east where spectral reflection occurs 5. Slight variations in tone resulting from a rough water surface produce a silky texture in the extreme east 6. Note also the dark-toned, rough textured woodland along the Assiniboine River 7 and Chater Creek 8.

Figure 1.7.a: large-scale photo

Figure 1.7.a: large-scale photo

Figure 1.7a

Vertical air photo: A25396-159

Flight height: 9,700 feet a.s.l.; lens focal length: 152.034 mm

Scale: 1:17,100 (approx.)

Date: June 4, 1980

Location: Township 10, Range 18 WI

Map sheets: 1:250,000: 62G Brandon

1:50,000: 62G/13 Brandon

Figure 1.7b: smaller scale photo

This photo covers a larger area than 1.7a including all the land shown on 1.7a. Here the Assiniboine River 1 is darker toned except in the south 2 where spectral reflection occurs. On this photo the sewage lagoons 3 are very dark toned, probably the result of different photo paper and processing. Note also the distinctive checkerboard pattern produced by the DLS system of land division 4.


Figure 1.7.b: smaller-scale photo

Figure 1.7.b: smaller-scale photo

Figure 1.7b

Vertical air photo: A25656-42

Flight height: 17,384 feet a.s.l.; lens focal length: 88.19 mm

Scale: 1:57,600 (approx.)

Date: April 9, 1981

Location: Township 10, Range 18 WI

Map sheets: 1:250,000: 62G Brandon

1:50,000: 62G/13 Brandon