Commit 76120ca1 authored by Calvin Metcalf's avatar Calvin Metcalf
Browse files

simplify proj creation

parent 3e47f7bc

src/Proj.js

+13 −98
Original line number Diff line number Diff line
@@ -6,79 +6,25 @@ define(['./extend','./common','./defs','./constants','./datum','./projections',' 
    }

    this.srsCodeInput = srsCode;

    var obj;

    if(typeof srsCode === 'string'){

    //check to see if this is a WKT string

    if ((srsCode.indexOf('GEOGCS') >= 0) || (srsCode.indexOf('GEOCCS') >= 0) || (srsCode.indexOf('PROJCS') >= 0) || (srsCode.indexOf('LOCAL_CS') >= 0)) {

      if(srsCode in defs){

        this.deriveConstants(defs[srsCode]);

        extend(this,defs[srsCode]);

      }else if ((srsCode.indexOf('GEOGCS') >= 0) || (srsCode.indexOf('GEOCCS') >= 0) || (srsCode.indexOf('PROJCS') >= 0) || (srsCode.indexOf('LOCAL_CS') >= 0)) {

        obj = wkt(srsCode);

        this.deriveConstants(obj);

        extend(this,obj);

        //this.loadProjCode(this.projName);

  

    }

    else {

      if (srsCode.indexOf(":") > -1) {

        this.srsAuth = srsCode.split(':')[0].toLowerCase();

        this.srsProjNumber = srsCode.split(':')[1];



      }

      else {

        this.srsAuth = '';

        this.srsProjNumber = this.srsCode;

    } else {

      this.deriveConstants(srsCode);

      extend(this,srsCode);

    }

      this.parseDefs(srsCode);



    }

    this.initTransforms(this.projName);

  };

  proj.prototype = {

  

    /**

     * Property: title

     * The title to describe the projection

     */

    title: null,

    /**

     * Property: projName

     * The projection class for this projection, e.g. lcc (lambert conformal conic,

     * or merc for mercator).  These are exactly equivalent to their Proj4 

     * counterparts.

     */

    projName: null,

    /**

     * Property: units

     * The units of the projection.  Values include 'm' and 'degrees'

     */

    units: null,

    /**

     * Property: datum

     * The datum specified for the projection

     */

    datum: null,

    /**

     * Property: x0

     * The x coordinate origin

     */

    x0: 0,

    /**

     * Property: y0

     * The y coordinate origin

     */

    y0: 0,

    /**

     * Property: localCS

     * Flag to indicate if the projection is a local one in which no transforms

     * are required.

     */

    localCS: false,

  

    /**

     * Constructor: initialize

     * Constructor for proj objects

     *

     * Parameters:

     * srsCode - a code for map projection definition parameters.  These are usually

     * (but not always) EPSG codes.

     */

  

    /**

     * Function: initTransforms

     *    Finalize the initialization of the Proj object
@@ -92,37 +38,6 @@ define(['./extend','./common','./defs','./constants','./datum','./projections',' 
      this.init();

    },

  

    /**

     * Function: parseWKT

     * Parses a WKT string to get initialization parameters

     *

     */

  

    /**

     * Function: parseDefs

     * Parses the PROJ.4 initialization string and sets the associated properties.

     *

     */

    parseDefs: function(srsCode) {

      this.defData = defs[srsCode];

      if (!this.defData) {

        return;

      }else{

        this.srsCode = srsCode;

      }

      var key;

      for (key in this.defData) {

        this[key] = this.defData[key];

      }

      extend(this,this.deriveConstants(this));

    },

  

    /**

     * Function: deriveConstants

     * Sets several derived constant values and initialization of datum and ellipse

     *     parameters.

     *

     */

    deriveConstants: function(self) {

      // DGR 2011-03-20 : nagrids -> nadgrids

      if (self.nadgrids && self.nadgrids.length === 0) {