Contents
Which is the correct way to enter latitude and longitude?
Latitudes and longitudes may be entered in any of three different formats, decimal degrees (DD.DD), degrees and decimal minutes (DD:MM.MM) or degrees, minutes, and decimal seconds (DD:MM:SS.SS).
Why do we use 360 degrees of longitude?
Because we can travel all around the world we use 360 degrees of longitude for a full circle and 180 degrees of latitude for the half circle of north-south. To make life more interesting, we don’t use 0-360 longitude and 0-180 degrees latitude though.
Where does the 0 degree latitude pass through?
0 degrees longitude passes through the ‘prime meridian’ of Greenwich, in south west London, England. Points west of this are negative longitude, points east are positive. 0 degrees latitude is the equator with positive numbers representing the northern hemisphere and negative the southern hemisphere.
How to calculate latitude and longitude in Excel?
Enter latitude and longitude of two points, select the desired units: nautical miles (nm), statute miles (sm), or kilometers (km) and click Compute. Latitudes and longitudes may be entered in any of three different formats, decimal degrees (DD.DD), degrees and decimal minutes (DD:MM.MM) or degrees, minutes, and decimal seconds (DD:MM:SS.SS).
How to check if a point is land or water in Google Maps?
You can use Google Maps Reverse Geocoding . In result set you can determine whether it is water by checking types. In waters case the type is natural_feature. See more at this link http://code.google.com/apis/maps/documentation/geocoding/#Types.
How are latitude and longitude measured in seconds?
Latitude is the distance north or south of the equator.Longitude is the distance east or west of the primemeridian (Greenwich, England). Latitude and longitudeare measured in seconds, minutes, and degrees: 60″ (seconds) = 1′ (minute)60′ (minutes) = 1° (degree)
How much does one degree of longitude cover?
One-degree of longitude equals 288,200 feet (54.6 miles), one minute equals 4,800 feet (0.91 mile), and one second equals 80 feet. Illustration showing longitude convergence. Latitude distances remain constant.
Is there an estimation algorithm for one meter?
I created a simple custom map on Google Maps that illustrates the estimation algorithm mentioned by the accepted answer (1/111111 == one meter). Feel free to see and play with it here:
Which is the best algorithm for offsetting a latitude?
But if you’re willing to accept errors above 10m for points offset more than approx 200m you may use a simplified flat earth calculation. I think the errors still will be less than 50m for offsets up to 1km. I find that Aviation Formulary, here is great for these types of formulas and algorithms.