Rubber sheeting topological process of stretching or shrinking a subarea or portion of a map or image to fit in registration with selected control points.
Rubber sheet transformation in gis.
Rubbersheeting makes spatial adjustments to align the input feature locations with more accurate target feature locations based on the specified rubbersheet links.
Expand alignment and click transform.
The input point features represent identity links that hold source positions unmoved during the rubbersheeting process.
Root mean square error measure of registration accuracy used during digitizing and coverage transformations.
The modify features pane appears.
Click the spatial adjustment menu point to adjustment methods then click a transformation method.
This drawback brings us to the idea of incorporating the historical maps into gis after rubber sheet transformation i e.
Qgis is a free open source gis package.
Used to control rubber sheeting and adjustment operations.
Click the adjustment methods drop down arrow and click rubbersheet.
The input link features represent the regular links.
They may be introduced by imperfect registration in map compilation lack of geodetic control in source data or a variety of other causes.
Affine similarity and projective.
Cadcorp spatial information system software sis map modeller is offering a tool for rubbersheeting data layers.
Click the spatial adjustment menu and click options.
On the edit tab in the features group click modify.
Geometric correction of them.
Rubbersheeting is used to make small geometric adjustments in your data usually to align features with more accurate information.
Click the general tab.
Qgis georeferencer plug in provides a number of transformation types including thin plate spline which enables full rubber sheeting.
By default arcmap supports three types of transformations.
Click either the natural neighbor or linear method and click ok.
Geometric distortions commonly occur in source maps.
Click the spatial adjustment menu and click options.
An affine transformation can differentially scale the data skew it rotate it and translate it.
You can press and hold the spacebar to temporarily turn off snapping as you create anchor points and draw displacement links or rubber sheet area polygons.
Click the spatial adjustment menu point to adjustment methods then click rubbersheet to set the adjustment method.
The graphic below illustrates the four possible changes.
X ax by c y dx ey f.
Rubber sheeting is a useful technique in historical gis where it is used to digitize and add old maps as feature layers in a modern gis.
Click the options button.
Rubber sheeting may improve the value of such sources and make them easier to compare to modern maps.
Before aerial photography arrived most maps were highly inaccurate by modern standards.
