diff --git a/include/usgscsm/Utilities.h b/include/usgscsm/Utilities.h
index 089c965e334e8b578938363716a1494e467e198c..44375d9b2f75994348c4541f9045b6d6a14fa927 100644
--- a/include/usgscsm/Utilities.h
+++ b/include/usgscsm/Utilities.h
@@ -70,16 +70,6 @@ void lagrangeInterp (
   const int&     i_order,
   double*        valueVector);
 
-double pixelResolution(
-  const csm::EcefCoord& groundPt,
-  const csm::EcefCoord& sensorPos,
-  const double&         sampleOrigin,
-  const double&         lineOrigin,
-  const double&         sampleSumming,
-  const double&         startingSample,
-  const double          iTransS[],
-  const double          iTransL[]);
-
 // Methods for checking/accessing the ISD
 
 double metric_conversion(double val, std::string from, std::string to="m");
diff --git a/src/Utilities.cpp b/src/Utilities.cpp
index aa09ace343f3362d9f143f7bb0bb9465235720c4..59f26368a98fdcfd6276a48982ddba06d9f640c6 100644
--- a/src/Utilities.cpp
+++ b/src/Utilities.cpp
@@ -272,26 +272,6 @@ void lagrangeInterp(
   }
 }
 
-// Compute the pixel reolution at a ground point
-double pixelResolution(
-  const csm::EcefCoord& groundPt,
-  const csm::EcefCoord& sensorPos,
-  const double&         sampleOrigin,
-  const double&         lineOrigin,
-  const double&         sampleSumming,
-  const double&         startingSample,
-  const double          iTransS[],
-  const double          iTransL[]) {
-  double x1, y1, x2, y2;
-  computeDistortedFocalPlaneCoordinates(
-        0.0, 0.0,
-        sampleOrigin,
-        lineOrigin,
-        sampleSumming,
-
-  );
-}
-
 // convert a measurement
 double metric_conversion(double val, std::string from, std::string to) {
     json typemap = {