From the GEOS changes at https://github.com/libgeos/geos/blob/master/NEWS

Could be exposed as new functions:

• GEOSBuildArea
• GEOSMakeValid
• GEOSPolygonize_valid
• GEOSCoverageUnion
• GEOSMinimumBoundingCircle
• GEOSCoordSeq_isCCW
• GEOSFrechetDistance
• GEOSReverse --> ENH: Add GEOSReverse #243
• GEOSSegmentIntersection
• GEOSGeomGetZ
• GEOSGeom_{get,set}UserData (Rashad Kanavath)
• GEOSGeom_{set,get}Precision (ENH: Add get / set precision ufuncs #257)
• GEOSMinimumRotatedRectangle
• GEOSMaximumInscribedCircle
• GEOSLargestEmptyCircle
• GEOSMinimumWidth
• GEOSMinimumClearance
• GEOSMinimumClearanceLine
• GEOSDistanceWithin —> [Done] dwithin for GEOS 3.10.0 #417
• GEOSDensify —> ENH: Add densify ufunc #299
• GEOSMakeValidWithParams
• GEOSWKBWriter_getFlavor, GEOSWKBWriter_setFlavor
• GEOSConstrainedDelaunayTriangulation

Having to do with strtree:

• GEOSSTRtree_nearest --> Added STRtree::nearest function #111
• GEOSDistanceIndexed

Functions that we could use internally:

• GEOSCoordSeq_setXY, GEOSCoordSeq_setXYZ, GEOSCoordSeq_getXY, GEOSCoordSeq_getXYZ
• GEOSGeom_createPointFromXY
• GEOSGeom_getXMin, GEOSGeom_getXMax, GEOSGeom_getYMin, GEOSGeom_getYMax
• GEOSCoordSeq_copyFromArrays, GEOSCoordSeq_copyFromBuffer, GEOSCoordSeq_copyToArrays, GEOSCoordSeq_copyToBuffer