“The minimum mappable area” refers to the smallest surface that can be accurately represented on a map. This depends on several factors, including the map scale, the accuracy of the input data, and the level of detail required.
In general, the larger the map scale, the smaller the minimum mappable area. For example, on a map at a scale of 1:1000, the smallest surface that can be accurately represented may be of the order of a few square meters, while on a map at a scale of 1:10000, the smallest surface that can be accurately represented may be of the order of several tens of square meters.
In addition, the accuracy of the input data also plays an important role in determining the minimum mappable area. For example, if the input data has a resolution of one square meter, then the smallest surface that can be accurately represented will be approximately one square meter.
In summary, the determination of the minimum mappable area depends on several factors, but it can be said that the map scale and the accuracy of the input data are the key factors that determine the smallest surface that can be accurately represented.
Relationship between map scale and minimum mappable area:
| Map Scale | Minimum Mappable Area |
|---|---|
| 1:1,000 | 1 m² |
| 1:2,500 | 6.25 m² |
| 1:5,000 | 25 m² |
| 1:10,000 | 100 m² |
| 1:25,000 | 625 m² |
| 1:50,000 | 2,500 m² |
| 1:100,000 | 10,000 m² |
| 1:250,000 | 62,500 m² |
| 1:500,000 | 250,000 m² |
| 1:1,000,000 | 1,000,000 m² (1 km²) |
It is important to note that these values are just a guide, and the accuracy of the cartographic representation depends on various factors such as the accuracy of the input data, the quality of the cartography, and the level of detail required.
The relationship between map scale, minimum mappable area, and Landsat 8 and Sentinel-2 data resolution:
| Map Scale | Minimum Mappable Area | Landsat 8 Resolution | Sentinel-2 Resolution |
|---|---|---|---|
| 1:1,000 | 1 m² | 30 m² | 10 m² |
| 1:2,500 | 6.25 m² | 75 m² | 25 m² |
| 1:5,000 | 25 m² | 150 m² | 50 m² |
| 1:10,000 | 100 m² | 300 m² | 100 m² |
| 1:25,000 | 625 m² | 750 m² | 250 m² |
| 1:50,000 | 2,500 m² | 1,500 m² | 500 m² |
| 1:100,000 | 10,000 m² | 3,000 m² | 1,000 m² |
| 1:250,000 | 62,500 m² | 7,500 m² | 2,500 m² |
| 1:500,000 | 250,000 m² | 15,000 m² | 5,000 m² |
| 1:1,000,000 | 1,000,000 m² (1 km²) | 30,000 m² | 10,000 m² |
It’s important to note that the Landsat 8 and Sentinel-2 resolution refers to the spatial resolution, which is the distance between each pixel in the image. Additionally, the accuracy of the input data and the quality of the cartography will also affect the accuracy of the cartographic representation.
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