short arrows pointing road indicating the height above sea Use the orthophoto map on page 17 , be shown on orthophoto maps. Activity 2.2 1. List four ways in which height can be $$ \$ 10000 $$ orthophoto map of 2. What contour interval is used on a $$ 1: 10000 $$ South Africa? 3. In what way are contour lines numbered on an orthophoto map to help us visualise the landscape features? 4. Identify the landscape features formed by the contours in the following grid boxes on the orthophoto map: a) $$ \mathrm{C1} $$ to $$ \mathrm{C5} $$ b) D3, D4, D5 and D6 c) D7 and E7 d) the area where the stadium is built (B7). 5. What do we call the way in which the height of 557 m is recorded in C 4 ?

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To solve the problem, let's break it down step by step based on the questions provided.

### 1. List four ways in which height can be represented on an orthophoto map of South Africa.
- **Contour Lines**: These are lines that connect points of equal elevation on the map.
- **Spot Heights**: Specific points marked with their exact elevation, usually indicated by a dot and a number.
- **Digital Elevation Models (DEMs)**: These are 3D representations of terrain that can be derived from the orthophoto.
- **Color Gradients**: Different colors may represent different elevation ranges, helping to visualize height changes.

### 2. What contour interval is used on a $$ 1:10000 $$ orthophoto map of South Africa?
The contour interval can vary based on the specific map and the terrain it represents. However, a common contour interval for a $$ 1:10000 $$ map in South Africa is typically $$ 5 $$ meters or $$ 10 $$ meters. You would need to refer to the specific map legend for the exact interval.

### 3. In what way are contour lines numbered on an orthophoto map to help us visualize the landscape features?
Contour lines are usually numbered at regular intervals, with the higher elevations marked with larger numbers. This helps in visualizing the slope and shape of the terrain. For example, if the contour lines are numbered $$ 100, 200, 300 $$ meters, it indicates that the land rises as you move from one line to the next.

### 4. Identify the landscape features formed by the contours in the following grid boxes on the orthophoto map:
- **a) C1 to C5**: This area may represent a hill or a valley depending on the contour spacing and shape.
- **b) D3, D4, D5, and D6**: These boxes could indicate a flat area or a gentle slope if the contours are widely spaced.
- **c) D7 and E7**: This area might show a steep slope or a cliff if the contours are closely packed.
- **d) The area where the stadium is built (B7)**: This could represent a flat area or a depression, depending on the contour lines' arrangement.

### 5. What do we call the way in which the height of 557 m is recorded in C4?
The height of $$ 557 $$ m recorded in $$ C4 $$ is referred to as a **Spot Height**. Spot heights are specific points on the map that indicate the exact elevation at that location.

This breakdown provides a clear understanding of how to interpret and analyze the orthophoto map based on the questions asked. If you have the specific map or additional details, we could refine the answers further.
1. **Height Representation on Orthophoto Maps:** - **Contour Lines**: Lines connecting points of equal elevation. - **Spot Heights**: Specific points with exact elevation marked by dots and numbers. - **Digital Elevation Models (DEMs)**: 3D representations of terrain. - **Color Gradients**: Colors indicating elevation ranges. 2. **Contour Interval on $$ 1:10000 $$ Map:** - Typically $$ 5 $$ meters or $$ 10 $$ meters, but check the map legend for exact details. 3. **Contour Line Numbering:** - Higher elevations marked with larger numbers to visualize terrain slopes and shapes. 4. **Landscape Features Identified:** - **a) C1 to C5**: Likely a hill or valley. - **b) D3, D4, D5, D6**: Possibly a flat area or gentle slope. - **c) D7 and E7**: May indicate a steep slope or cliff. - **d) B7 (Stadium Area)**: Could be a flat area or depression. 5. **Recording Height of 557 m in C4:** - **Spot Height**: A specific point with exact elevation marked on the map. This simplified summary covers the key points from the original full answer, providing clear and concise information without making judgments.

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