Official version history and changelog information for Surfer (2021). 

Surfer 20.1.195 (January 5, 2021)

New Features and Improvements

• New Map Type: Peaks and Depressions
• Base Map: use attribute as Object ID for polylines, polygons, points
• Grid Info: Polygon Boundary: report statistics for each polygon individually
• Grid Volume: Polygon Boundary: report volume for each polygon individually
• 3D View: 3D PDF Export: reduce file size
• 3D View: 3D PDF Export: speed up export
• 3D View: add color scale bar
• 3D View: Antialiasing (improve appearance of grid lines, axes, text, etc)
• 3D View: export to VRML
• 3D View: light 3D point symbols (spheres, cubes) based on Environment Light Position
• 3D View: Vector Contours: use same line properties (width, color) as original contour lines
• Automation: add Base from Data
• Automation: add new top level legend
• Automation: add Base layer symbology
• Automation: CoordinateSystem: New Local System (WKT parser should support LOCAL_CS)
• Automation: GridData: have Grid Z Limits option
• Automation: GridData: have Z Transform option
• Automation: GridData: save and load the grid settings files (*.srfgds)
• Automation: add new map scale bar options
• Automation: MapFrame: set ScalingRatio
• Automation: PostLegend: add new properties
• Automation: VectorLegend: add new properties

Fixes:

• 3D View: 3D surface map and 1-grid vector map with same source grid creates two surfaces
• 3D View: Disabled surface texture appears in 3D PDF export
• 3D View: Title angle does not rotate title text
• Contents: Undo deletion: layers from different maps are selected in Contents
• Crash after creating 3D view
• Crash when closing Surfer after printing
• Crash when importing multiple files
• Crash when opening an empty PDF file to Surfer
• Double click on BAS opens empty Scripter
• EMF export: Rotated text exports as polygons/polylines for certain degrees of rotation
• Internal Error (cacheejectionlru.cpp)
• Internal Error after clicking to 3D view and getting error can't transform coordinates (gscatch.cpp)
• Internal Error after creating 3D Surface map (graphics3.cpp)
• Internal Error after exporting the 3D View to 3D (stratosstatemanager.cpp)
• Internal Error in 3D view with Walk (statepresenter.cpp)
• Internal Error when cancelling 3D View flythrough (grid.cpp)
• Internal Error when closing Surfer (autodocuments.cpp)
• Internal Error when creating contour map (with fill) from Grid Calculus command
• Internal Error when loading an ASC grid (trlattice.cpp)
• Internal Error when set contour smoothing (contourlabeler.cpp)
• Internal Error with Undo (scenelist.cpp)