scale

1:100,000 means that 1cm on the map is equivalent to:
- 1000m
- 1km

1:250,000 means that 1cm on the map is equivalent to:
- 2,500m
- 2.5km

1:50,000 means that 1cm on the map is equivalent to:
- 500m
- 1/2 km

1:25,000 means that 1cm on the map is equivalent to:
- 250m
- 1/4 km

Large scale are used to show detail, e.g. a street directory.

Small scale are used to show detail, e.g. a satellite image of NSW.

Oblique maps and photos have scales that vary from one part of the image to another (remember that an oblique photograph is taken at an angle).