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The scale of vertical aerial photography is 1 : 10000, and the forward overiap is 60%, side lap is 25%, the effective area covered by one photograph after accounting for loss of area due to overlaps is 1 sq.km, and the number of photographs required to cover an area of 500 sq.km is 500. When the scale of photography is made 1 : 5000, the number of photographs required would be : (1) 250 (2) 1000 (3) 2000 (4) 125?
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The scale of vertical aerial photography is 1 : 10000, and the forward...
**Given data:**
- Scale of vertical aerial photography: 1 : 10,000
- Forward overlap: 60%
- Side overlap: 25%
- Effective area covered by one photograph after accounting for overlaps: 1 sq.km
- Area to be covered: 500 sq.km
- Number of photographs required to cover 500 sq.km: 500
**Calculating the area covered by one photograph:**
- Let's assume the actual area covered by one photograph without accounting for overlaps is A sq.km.
- The forward overlap is 60%, which means that 40% of the photograph's area is lost due to overlap.
- Similarly, the side overlap is 25%, resulting in a loss of 25% of the photograph's area due to overlap.
- After accounting for overlaps, the effective area covered by one photograph is 1 sq.km.
- Therefore, we can write the equation: A * (1 - 0.4) * (1 - 0.25) = 1
- Solving this equation, we get: A = 1.6667 sq.km
**Calculating the number of photographs required:**
- The area to be covered is 500 sq.km, and the area covered by one photograph is 1.6667 sq.km.
- Therefore, the number of photographs required is 500 / 1.6667 = 300
**Calculating the number of photographs required with a scale of 1:5000:**
- The scale of photography is changed to 1:5000, which means that the area covered by one photograph will decrease.
- The scale ratio is halved from 1:10,000 to 1:5000, so the area covered by one photograph will be quartered.
- The new area covered by one photograph will be 1.6667 / 4 = 0.4167 sq.km.
- The area to be covered is still 500 sq.km, so the number of photographs required will be 500 / 0.4167 = 1200
Therefore, the number of photographs required with a scale of 1:5000 is 1200.
**Answer:**
The number of photographs required when the scale of photography is made 1:5000 is 1200. (Option 3)
- Scale of vertical aerial photography: 1 : 10,000
- Forward overlap: 60%
- Side overlap: 25%
- Effective area covered by one photograph after accounting for overlaps: 1 sq.km
- Area to be covered: 500 sq.km
- Number of photographs required to cover 500 sq.km: 500
**Calculating the area covered by one photograph:**
- Let's assume the actual area covered by one photograph without accounting for overlaps is A sq.km.
- The forward overlap is 60%, which means that 40% of the photograph's area is lost due to overlap.
- Similarly, the side overlap is 25%, resulting in a loss of 25% of the photograph's area due to overlap.
- After accounting for overlaps, the effective area covered by one photograph is 1 sq.km.
- Therefore, we can write the equation: A * (1 - 0.4) * (1 - 0.25) = 1
- Solving this equation, we get: A = 1.6667 sq.km
**Calculating the number of photographs required:**
- The area to be covered is 500 sq.km, and the area covered by one photograph is 1.6667 sq.km.
- Therefore, the number of photographs required is 500 / 1.6667 = 300
**Calculating the number of photographs required with a scale of 1:5000:**
- The scale of photography is changed to 1:5000, which means that the area covered by one photograph will decrease.
- The scale ratio is halved from 1:10,000 to 1:5000, so the area covered by one photograph will be quartered.
- The new area covered by one photograph will be 1.6667 / 4 = 0.4167 sq.km.
- The area to be covered is still 500 sq.km, so the number of photographs required will be 500 / 0.4167 = 1200
Therefore, the number of photographs required with a scale of 1:5000 is 1200.
**Answer:**
The number of photographs required when the scale of photography is made 1:5000 is 1200. (Option 3)
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The scale of vertical aerial photography is 1 : 10000, and the forward overiap is 60%, side lap is 25%, the effective area covered by one photograph after accounting for loss of area due to overlaps is 1 sq.km, and the number of photographs required to cover an area of 500 sq.km is 500. When the scale of photography is made 1 : 5000, the number of photographs required would be : (1) 250 (2) 1000 (3) 2000 (4) 125?
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The scale of vertical aerial photography is 1 : 10000, and the forward overiap is 60%, side lap is 25%, the effective area covered by one photograph after accounting for loss of area due to overlaps is 1 sq.km, and the number of photographs required to cover an area of 500 sq.km is 500. When the scale of photography is made 1 : 5000, the number of photographs required would be : (1) 250 (2) 1000 (3) 2000 (4) 125? for Civil Engineering (CE) 2024 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about The scale of vertical aerial photography is 1 : 10000, and the forward overiap is 60%, side lap is 25%, the effective area covered by one photograph after accounting for loss of area due to overlaps is 1 sq.km, and the number of photographs required to cover an area of 500 sq.km is 500. When the scale of photography is made 1 : 5000, the number of photographs required would be : (1) 250 (2) 1000 (3) 2000 (4) 125? covers all topics & solutions for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The scale of vertical aerial photography is 1 : 10000, and the forward overiap is 60%, side lap is 25%, the effective area covered by one photograph after accounting for loss of area due to overlaps is 1 sq.km, and the number of photographs required to cover an area of 500 sq.km is 500. When the scale of photography is made 1 : 5000, the number of photographs required would be : (1) 250 (2) 1000 (3) 2000 (4) 125?.
The scale of vertical aerial photography is 1 : 10000, and the forward overiap is 60%, side lap is 25%, the effective area covered by one photograph after accounting for loss of area due to overlaps is 1 sq.km, and the number of photographs required to cover an area of 500 sq.km is 500. When the scale of photography is made 1 : 5000, the number of photographs required would be : (1) 250 (2) 1000 (3) 2000 (4) 125? for Civil Engineering (CE) 2024 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about The scale of vertical aerial photography is 1 : 10000, and the forward overiap is 60%, side lap is 25%, the effective area covered by one photograph after accounting for loss of area due to overlaps is 1 sq.km, and the number of photographs required to cover an area of 500 sq.km is 500. When the scale of photography is made 1 : 5000, the number of photographs required would be : (1) 250 (2) 1000 (3) 2000 (4) 125? covers all topics & solutions for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The scale of vertical aerial photography is 1 : 10000, and the forward overiap is 60%, side lap is 25%, the effective area covered by one photograph after accounting for loss of area due to overlaps is 1 sq.km, and the number of photographs required to cover an area of 500 sq.km is 500. When the scale of photography is made 1 : 5000, the number of photographs required would be : (1) 250 (2) 1000 (3) 2000 (4) 125?.
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