![]() The Equator and Prime Meridian are the reference planes used to define latitude and longitude. Latitude and Longitude are the angles measuring North to South and East to West. These coordinates values are measured in degrees, and represent angular distances calculated from the centre of the Earth. Similarly, any point on the earth can be defined with a pair of numbers which are called geographic coordinates (latitude, Longitude) assuming that Earth is Sphere. West: The direction opposite to the Earth's rotation is West.Ĭartesian coordinate is a point defined by x and y (a pair of numbers) in a plane. Describing positions on the surface of the Earth in Latitude and Longitude are the most common representation of spatial data and is called Geographic Coordinate Systems.Įast: The direction parallel to the Equator and toward which the Earth's rotation is Geographical coordinate System (Global Coordinate Systems) (i.e., Latitude and Longitude values, in degrees,įor sufficient accuracy to allow global exploration, navigation, and mapping earth is considered as spherical for Mathematical Modeling. ![]() But when maps represent the bigger area, Curvature of Earth has to be considered and hence there is a need for the geographical coordinate system. When the survey is done for less than 10 Km, variation due to the curvature of the earth will be insignificant and flat earth models can be used. So the Cartesian coordinate system cannot be used to represent Earth Surface as Earth has a Spherical Surface. Each reference line is called a coordinate axis or just axis of the system, and the point where they meet is its origin, usually, at ordered pair (0,0),Įarth is not a Flat Surface. Universal Transverse Mercator coordinate systemĪ Cartesian coordinate system specifies each point uniquely in a plane by a pair of numerical coordinates, which are the signed distances from the point to two fixed perpendicular directed lines, measured in the same unit of length.This white paper explains which are the factors to be understood for Latitude and Longitude Conversion. Out Excel will have converted Data as shown below formatĬonverting Latitude Longitude into Map Coordinate is not a single step conversion as in most of the conversion from one unit to another unit by applying a simple formula. Then converted Data will be downloaded in Download folder as LatLong.xlsx fileħ. Click on Browse button to select LatLong CSV fileĦ. Once login to website, click on UTM to Lanflong Conversion menu under Modules Main Menuģ. Click on Login button enter your credentials to loginĢ. Par conséquent, décline toute responsabilité quant à la précision et l'usage fait des résultats obtenus.1. Il est fortement recommandé que l’utilisateur dispose préalablementĭe quelques points de contrôle dont les coordonnées sont connues dans les systèmes de coordonnées à utiliser pour les comparer avec les coordonnées obtenus par l’application.ĭ’ailleurs, cette remarque s’applique à tous les logiciels de conversion de coordonnées. L’utilisateur doit s’assurer que les résultats correspondent bien à ses attentes. ![]() Le choix du réseau géodésique, l’actualisation des paramètres des Datums, etc… Ainsi, avant d’adopter définitivement les résultats donnés par l’application, ![]() Remarque importante concernant la précision et l’exactitude des résultats obtenusĭifférents facteurs limitent la précision des transformations notamment les spécificités pratiques de chaque pays ou territoire, la propagation des erreurs, To convert the angle unit of geographical coordinates Latitude-longitude (degree, minute seconds (dms), grad, radians), just use.For GPS coordinates, select the WGS84 system for example, to convert coordinates GPS in UTM Zone 10N coordinates, choose left WGS84 and UTM Zone 10N right.(Other datums and projections will be added following the request of the visitors). ![]() X, Y, Z -> Long, Lat, h: Select left WGS84_XYZ (geocentric) and right: WGS84.Ī coordinate converter allows performing conversion between different geodetic systems and most used projections, for example, converting GPS coordinates (WGS84) to Lambert, UTM, Mercator, RGF93, NAD83, NAD27. Long, Lat, h -> X, Y, Z: Select WGS84 left and right: WGS84_XYZ (geocentric) under 'International' menu New !: Geocentric cartesian coordinates (X, Y, Z)įollowing a request from a visitor, I added the option to convert to and from Geocentric cartesian coordinates (X, Y, Z). ![]()
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