Method, system and programmed medium for massive geodetic block triangulation in satellite imaging
AssigneeEarth Satellite Corporation
InventorsMichael Place, Jon Dykstra, Charles Sheffield, Roger Mitchell
Life of this patent
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Abstract
A computationally efficient method, system and programmed medium according to the present invention creates highly accurate maps of celestial bodies, spanning multiple UTM zones given sparse control points on the celestial body surface without requiring the existence or synthesis of a mathematical model of the satellite image sensor. The present invention provides an improved method and system for producing orthorectification coefficients needed to produce highly accurate maps of the surface of celestial bodies that span multiple UTM zones.
Claims30
A method for producing a map of a surface using satellite imagery, control points, tie points and digital terrain module data comprising the steps of:
- correcting parallax errors by using said tie points, control points and digital terrain module data;
- calculating non-linear solution errors for said tie points and control points;
- converting said non-linear solution errors into angular geodetic coordinates;
- calculating orthorectification coefficients;
- and
- producing a map of a surface from said orthorectification coefficients.
A system for producing a map of a surface using satellite imagery, control points, tie points and digital terrain module data comprising:
- means for correcting parallax errors by using said tie points, control points and digital terrain module data;
- means for calculating non-linear solution errors for said tie points and control points;
- means for converting said non-linear solution errors into angular geodetic coordinates;
- means for calculating orthorectification coefficients;
- and
- means for producing a map of a surface from said orthorectification coefficients.
A computer program comprising a computer useable medium having computer program logic recorded thereon for enabling a processor in a computer system to combine satellite imagery data using control points, tie points and digital terrain module data for producing a map of a surface, said computer program comprising:
- a module for correcting parallax errors by using said tie points, control points and digital terrain module data;
- a module for calculating non-linear solution errors for said tie points and control points;
- and
- a module for converting said non-linear solution errors into angular geodetic coordinates;
- whereby orthorectification coefficients are calculated and a map of a surface is produced using said coefficients.
A map of a surface produced using satellite imagery, control points, tie points and digital terrain module data, said map being produced by the steps of:
- iteratively calculating parallax errors for said tie and control points;
- iteratively performing non-linear space oblique mercator error calculations for said tie and control points converted into angular geodetic coordinates;
- calculating orthorectification coefficients using said calculated parallax and angular geodetic errors;
- and
- computing said map of said surface using said orthorectification coefficients.
Dependencies are inferred from the claim text.