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# Topic: Geographic coordinate conversion

###### In the News (Fri 19 Jul 19)

 Geographic coordinate system - Wikipedia, the free encyclopedia A geographic coordinate system expresses every location on Earth by two of the three coordinates of a spherical coordinate system which is aligned with the spin axis of Earth. Borrowing from theories of ancient Babylonians, later expanded by the famous Greek thinker and geographer Ptolemy, a full circle is assigned 360 degrees (360°). The equator is obviously an important part of this coordinate system, it represents the zeropoint of the latitude angle, and the halfway point between the poles. en.wikipedia.org /wiki/Geographic_coordinate_system   (709 words)

 Geographic coordinate conversion - Wikipedia, the free encyclopedia Depending on which type of coordinate you are provided with, and which type you would like to work with, you may have to do some conversion. Given a decimal longitudinal coordinate such as -87.728055 it is trivial to convert it to DMS form. A coordinate with at 0°0'0" latitude or longitude is neither North nor South, East nor West. en.wikipedia.org /wiki/Geographic_coordinate_conversion   (772 words)

 Coordinate system - Facts, Information, and Encyclopedia Reference article Changing the basis is a coordinate transformation, a linear transformation that can be summarized by a matrix, and is computationally the same as a mapping of points to other points keeping the bases the same: e.g. Curvilinear coordinates are a generalization of coordinate systems generally; the system is based on the intersection of curves. Intrinsic coordinates describe a point upon a curve by the length of the curve to that point and the angle the tangent to that point makes with the x-axis. www.startsurfing.com /encyclopedia/c/o/o/Coordinate.html   (1130 words)

 Geographic Coordinate System Transformations The transformations may be most readily achieved by first expressing the observed or source geographical coordinates in terms of three dimensional XYZ cartesian values (geocentric coordinates) instead of the normal angular expressions of latitude and longitude. One such application is the coordinate transformation introduced to enable the conversion of coordinates expressed in the North American Datum of 1927 (including the Clarke 1866 ellipsoid) to coordinates expressed in the new North American Datum of 1983 which takes the GRS 1980 ellipsoid. Because the coordinate differences are small and the coordinates in the source and target systems are very similar in magnitude, in reversible polynomial transformations it is possible to adopt the same coordinate values for the evaluation point in both source and target systems. www.posc.org /Epicentre.2_2/DataModel/ExamplesofUsage/eu_cs35.html   (5780 words)

 Coordinate Systems Geographic information systems are information systems that permit complex associations to be made between entities using geometric references. In a coordinate system, many differences are permitted to vary at the same time ('co' having a root meaning along the lines of 'with', and 'ordinate' implying something to do with placement or measurement in some sort of scale.) The incremental change that a coordinate system records are the units of measure. When transforming coordinate systems it is important to think about transformation the way we think about other associative functions in information systems -- that is we are trying to define a function that simulates the actual distortion of the geometry in the unknown system. www.geog.ubc.ca /courses/klink/g470/notes/coordinates/coordinates.html   (2585 words)

 Datums and Coordinate Conversion Practical Exercise GEOTRANS (Geographic Translator) is an application that allows you to convert geographic coordinates among a wide variety of coordinate systems, map projections, grids, and datums. If the input coordinate reference frame has any parameters associated with it (e.g., a central meridian), and the default parameter values displayed in the upper half of the window are not the desired values, change the parameter values by selecting the displayed values and typing over them. If the output coordinate reference frame has any parameters associated with it (e.g., a central meridian), and the default parameter values displayed in the lower half of the window are not the desired values, change the parameter values by selecting the displayed values and typing over them. www.oc.nps.navy.mil /oc3902/lab4_datums.html   (3161 words)

 Cmyk Conversion   (Site not responding. Last check: 2007-10-21) Informal conversion of common units Informal conversion of common measuring units often needs to be done without calculator or computer. Geographic coordinate conversion Geographic coordinates consist of latitude and longitude. By Israeli residents who travel overseas solely for the purpose of undergoing a non-Orthodox conversion are entitled to Israeli citizenship under the Law of Return, the High Court of Justice ruled yesterday in a 7-4 decision. bocolors.com /Cmyk+Conversion.html   (643 words)

 The Ultimate Latitude Dog Breeds Information Guide and Reference Lines of latitude other than the Equator are approximately small circles on the surface of the Earth; they are not geodesics since the shortest route between two points at the same latitude involves moving farther away from the equator. In common usage "latitude" refers to geodetic or geographic latitude φ and is the angle between a plumb line and the equatorial plane — because it originated as the angle between horizon and pole star. For other planets such as Mars, geographic and geocentric latitude are called "planetographic" and "planetocentric" latitude, respectively. www.dogluvers.com /dog_breeds/Latitude   (1464 words)

 Reference.com/Encyclopedia/Latitude Because the Earth is slightly flattened by its rotation, cartographers refer to a variety of auxiliary latitudes to precisely adapt spherical projections according to their purpose. More generally, for other planets such as Mars, geographic and geocentric latitude are called "planetographic" and "planetocentric" latitude, respectively. In common usage, "latitude" refers to geodetic or geographic latitude φ and is the angle between the equatorial plane and a line that is normal to the reference spheroid, which approximates the shape of the Earth to account for flattening of the poles and bulging of the equator. www.reference.com /browse/wiki/Latitude   (2039 words)

 Tralaine Coordinate Conversion Software converts coordinates in data files from one geographic coordinate system to another; latitudes and longitudes to State Planes or State Planes to UTM's for example. Coordinates are converted from one system to another during a file copy process. Conversions between datums is accomplished using DMA's multiple regression formulas where data is available, or the Bursa/Wolfe or Molodensky transformations. www.mentorsoftwareinc.com /PRODUCTS/TRALAINE.HTM   (844 words)

 Setting Geographic Coorinates The coordinates will automatically be displayed, but the name of the coordinate, such as the name of the intersecting roads, will need to be entered. To register the coordinate, first zoom in as tight as possible on the area to register on the drawn map (the road or waterway intersection). Once the coordinates are registered on the unreferenced map, the map may disappear from the screen. www.farmworks.com /support/settingcoordinates.html   (778 words)

 Mentor Software - TralaineDLL To convert coordinates from any coordinate defined coordinate system to any other, including full datum shift, you call a single function which takes three arguments. Use the DLL to add geographic coordinate conversion to your C, C++, MFC, Visual Basic, Dephi 2, or Optima++ applications. Coordinate system definitions are given simple, easy to remember names and are maintained in simple file we call a Coordinate System Dictionary. www.mentorsoftwareinc.com /products/traldll.htm   (1093 words)

 NJDEP - NJGS DGS03-1 Coordinate Conversion Utility Users Guide The geographic area for which this conversion will work is bounded on the east by longitude 73° 37' 30" and on the west by 75° 37" 30". Thus, the SPCS is a rectangular (x,y or northing, easting) coordinate system describing geodetic positions of a limited area (a state or a portion of it) on a plane. The (x,y) coordinates are computed by projecting latitudes and longitudes from a mathematical approximation of the earth (i.e., NAD83) onto a rectangular grid. www.state.nj.us /dep/njgs/geodata/dgs03-1usrgd.htm   (1326 words)

 GPS RENTAL & COORDINATE CONVERSION SUPPORT In conjunction with path studies and/or frequency coordination, Global Positioning System (GPS) receivers are available for rental to determine latitude and longitude. Latitude and Longitude are defined by various datums or geographic ellipsoids. Municipal maps, road surveys etc.in "state planar coordinates", are sometimes available with great accuracy in small to large urban areas. www.mv.com /ipusers/consolidated/gps.html   (351 words)

 NGA: (U) GEOTRANS 2.3 Geographic Translator (UNCLASSIFIED) GEOTRANS (Geographic Translator) is an application program which allows you to easily convert geographic coordinates among a wide variety of coordinate systems, map projections, and datums. To convert a set of coordinates, simply select the coordinate system or map projection, and the datum, in which your coordinates are defined, enter the source coordinates, select the coordinate system or map projection, and the datum, to which you want the coordinates to be converted, and click on the Convert button. Using the GEOTRANS file processing interface, you can select an existing file of coordinates to be converted, define the coordinate system or map projection, and the datum, to which you want to convert the coordinates, and specify the name and location of the output file that is to be created. earth-info.nga.mil /GandG/geotrans   (764 words)

 Geographic coordinate system   (Site not responding. Last check: 2007-10-21) The geographic (earth-mapping) coordinate system is a spherical coordinate system which is aligned with the spin axis of the Earth. It defines two angles measured from the center of the Earth. They trace circles on the surface of the Earth, but the only parallel that is a great circle is the equator (latitude=0 degrees). bopedia.com /en/wikipedia/g/ge/geographic_coordinate_system.html   (265 words)

 Coordinate conversion software- Tralaine (from RockWare) is coordinate conversion software that converts coordinates in data files from one geographic coordinate system to another; latitudes and longitudes to State Planes or State Planes to UTM's for example. Coordinate System Dictionary includes over 1000 coordinate system definitions and you can modify any of these or define your own. NAD27 to NAD83 conversions (or vice versa) are performed using the exact same algorithm and data files as used by the National Geodetic Service's NADCON program. www.rockware.com /catalog/pages/tralaine.html   (634 words)

 Geographic/UTM Coordinate Converter You can convert between geographic coordinates and Universal Transverse Mercator (UTM) coordinates using this form. Geographic coordinates are entered and displayed in decimal degrees. UTM coordinates are entered and displayed in meters. home.hiwaay.net /~taylorc/toolbox/geography/geoutm.html   (112 words)

 Our Staff Her duties include database entry, attributing, and polygon creation using both digitizing and coordinate geometry of plats, surveys and tax lot descriptions in data conversion projects. Blaine County Data Conversion: : She was responsible for the conversion of county subdivisions, and rural metes and bounds parcels through the use of coordinate geometry. She was also responsible for the attributing of parcel polygons with the parcel id number and the parcel boundary sides with dimensions from source documents. www.geographicmapping.com /gmci_codi.htm   (179 words)

 RockWare- Coordinate Calculator: free coordinate conversion software performs the conversion of the coordinates of a point from one geographic coordinate system to aÂ second geographic coordinate system interactively. The coordinate system reflects the combination of a cartographic projection and datum. For those needing greater functionality, Tralaine is a coordinate conversion program that gives you all the functionality of the Coordinate Calculator as well as: www.rockware.com /catalog/pages/freecalculator.html   (160 words)

 Public Land Survey Subdivision Coordinate Conversion Program   (Site not responding. Last check: 2007-10-21) The coordinate for the PLS description is taken from the centroid of the rubber-sheeted grid cell which matches the PLS subdivision. The coordinates are written to the X and Y coordinate fields in the input table and the AML loops to the next record. The accuracy of the coordinates generated will depend upon the accuracy of the input PLS subdivision description, the PLS section coverage used, and the amount of error resulting from the rubber-sheeting process. www.ecy.wa.gov /services/GIS/apps/pls2xy/pls2xy.htm   (520 words)

 Open Directory - Science: Social Sciences: Geography: Geographic Information Systems: Software   (Site not responding. Last check: 2007-10-21) Geographic Information Management Services - Complete GIS solutions based in South Africa. Geographic Resources Analysis Support System - GRASS GIS is an open source, free software with raster, vector, image processing, and graphics production functionality. GeoGraphs Corporation - Software company specializing in internet mapping and GIS using MacroMedia Flash technology and OpenSource technology (PHP, MySQL, Apache). dmoz.org /Science/Social_Sciences/Geography/Geographic_Information_Systems/Software   (1576 words)

 Geographic Mapping Consultants, Inc. Geographic Mapping Consultants, Inc. (GMCI) is a professional consulting company located in Moscow, Idaho. Our company has been providing solutions in Geographic Information Systems (GIS) consulting, spatial data conversion, custom application development, GPS data collection, professional land surveying, and industry focused training programs since 1989. We specialize in converting archived paper maps and documents to digital data sets, both preserving and increasing the accessiblity of such data. www.geographicmapping.com   (295 words)

 CS_GeographicCoordinateSystem Some geographic coordinate systems are Lat/Lon, and some are Lon/Lat. Some geographic coordinate systems provide several transformations into WGS84, which are designed to provide good accuracy in different areas of interest. The first conversion (with index=0) should provide acceptable accuracy over the largest possible area of interest. deegree.sourceforge.net /deegree1.x.x_javadoc/org/opengis/cs/CS_GeographicCoordinateSystem.html   (124 words)

 Coordinate Conversions Blue Marble Geographics is pleased to announce they will be offering applied geodesy training in their Geographic Calculator class after the GIS for Oil and Gas Conference on Friday, September 22nd. Coordinate systems may differ, depending on the location of the map data on the Earth, and how the specific elements of the coordinate system are used. In order for users to standardize their map data, complicated conversions are often required to conform their data into the same coordinate system. www.bluemarblegeo.com /solutions/coordconv.php   (356 words)

 GIS News: Geographic Transformer (4.5) and Geographic Calculator (5.2) from Blue Marble Geographics Blue Marble Geographics has released updated versions of two of their products that dramatically extend their coordinate conversion support and allow users to experience complete interactive functionality for their evaluation prior to purchase. Both new releases are free to subscribers of the Geographic Calculator and Geographic Transformer annual support and update program. The world's coordinate conversion tool - The Geographic Calculator offers free conversions and full functionality in the evaluation version allowing users to perform a dozen interactive coordinate conversions using their own data - and all functions within the interactive tab are fully operational. www.gisdevelopment.net /news/viewn.asp?id=GIS:N_wdrjyxvz   (308 words)

 Geoconv: Geographic Coordinates Conversion   (Site not responding. Last check: 2007-10-21) I have been working on geographic coordinates conversion routines in java. In particular you will find general information on geographic coordinate systems, information on French projective systems, and coordinate conversion algorithms. Eric Sibert has also been developping a coordinates conversion software, available from here, now in open source. www.i3s.unice.fr /~johan/gps   (238 words)

 TatukGIS Coordinate Calculator This Windows application interactively converts the coordinates of a point between geographic coordinate systems. The Calculator supports any coordinate system that can be defined by any of the 24 supported projections and 225 supported datum's. The Calculator can be used to convert coordinates to and from all the U.S. State Plane coordinate systems by entering the proper settings for each State Plane. www.tatukgis.com /products/Calculator/Calculator.aspx   (102 words)

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