Geospatial Resolution

1. Geospatial Resolution

Personal Map STORES raw latitude and longitude to a maximum of 7 decimal places.

During PROCESSING Fiduciary Exchange always use 6 decimal places (cut off extra places or pad insufficient places with zeros).

With a maximum resolution of 0.000001 degree, the coordinate values of the excess degrees are always ROUNDED DOWN to remove excess decimal places. For example, coordinates measured at

  • 0.000001001 degree is treated as 0.000001 degree
  • 0.000001999 degree is treated as 0.000001 degree

1.1. Degree vs Distance

The following are the approximate distances for each degree at different latitudes:

degree latitude longitude
110.574 km 111.320 km
15° 110.649 km 107.551 km
30° 110.852 km 96.486 km
45° 111.133 km 78.847 km
60° 111.412 km 55.800 km
75° 111.618 km 28.902 km
90° 111.694 km 0.000 km

1.2. Decimal Resolution

Assuming at equator a one degree square is the same as a 111km x 111km square, the resolution at each decimal point is approximately:

Decimal Place 0 1 2 3 4 5 6 7
Distance 111km 11km 1.1km 111m 11m 1.1m 11cm 1.1cm

As we move towards the poles the distance between longitude will get smaller while the distance between latitude remains roughly the same. So the above decimal place resolution table can be viewed as very rough maximum distance between 2 points (or minimum resolution for data at that decimal point).

1.3. Distance Formula

Current using Haversine Formula for calculating distance between two Longitudes and Latitudes based location points.

2. Time Resolution

Time is stored and processed at one second resolution.