Tolerance is a distance value within which all nodes or (and) lines are considered to be coincident and identical. Tolerance values are often set when working with operations such as Vector Dataset, Dynamic Segmentation, and Spatial Analysis.

Different coordinate systems have different default tolerance values. If Source Dataset is a Projected Coordinate System, the default tolerance value is 1m; If the Source Dataset is a Geographic Coordinate System, the default tolerance is 0.00001 °; If the Source Dataset coordinates are Planar Coordinate System, the tolerance defaults to one millionth of the longer side of the Dataset, in the same units as Unit.

The default tolerance value is based on 1 meter, and when Dataset is GCS, the unit is degrees. The conversion between meters and degrees can be converted by the circumference of the Earth: the equatorial circumference of the Earth is.7 km 40075, and dividing 360 ° by.7 km 40075 equals 0.0000898 °/m, while the higher the latitude, At the same latitude, the smaller the length of a circle of the earth, the greater the longitude and latitude value corresponding to the actual distance of 1m. The approximate value of 0.00001 ° is therefore taken to represent a distance of about 1 m.

Caution:

• If the source Vector Dataset has Fuzzy, the default tolerance value is the same as Fuzzy.
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• tolerance range is 0, + ∞). If the input tolerance value exceeds the tolerance range, the red prompt in front of the value box will show Prompt.