Rubbersheeting is typically used to align two or more layers.
Rubber sheet transformation in gis.
This exercise will show you how to rubber sheet data by using displacement links multiple displacement links and identity links.
The graphic below illustrates the four possible changes.
X ax by c y dx ey f.
Historical maps rubber sheet transformation gis landscape visualization 1.
It is slightly faster and produces good results when you have many rubbersheet links spread uniformly over the data.
An affine transformation can differentially scale the data skew it rotate it and translate it.
Esri s arcgis 8 3 has the capability of rubbersheeting vector data and arcmap 9 2 may also rubber sheet raster layers.
Autocad s land desktop allows a user to rubber sheet raster data.
Click the adjustment methods drop down arrow and click rubbersheet.
This process moves the features of a layer using a piecewise transformation that preserves straight lines.
Most gis projects require georeferencing some raster data.
You can transform features that are visible and editable by selecting them or transform all features on specified layers.
See about spatial adjustment rubbersheeting for more details.
The method parameter determines the interpolation method used to create the temporary tins in rubbersheeting.
Esri s arcgis 8 3 has the capability of rubber sheeting vector data and arcmap 9 2 may also rubber sheet raster layers.
Two point displacement links define the origin and target location of the features you are transforming.
Click either the natural neighbor or linear method and click ok.
The key difference between rubbersheeting and transformations however is that the distance features move depends on their proximity to a link and the length of that link.
Similar to transformations displacement links are used in rubbersheeting to determine where features are moved.
Georeferencing is the process of assigning real world coordinates to each pixel of the raster.
In the modify features pane transform includes linear and natural neighbor interpolation methods for rubber sheeting features.
Many times these coordinates are obtained by doing field surveys collecting coordinates with a gps device for few easily identifiable features.
The affine transformation function is.
Linear this method creates a quick tin surface but does not really take into account the neighborhood.
Georeferencing topo sheets and scanned maps.
Click the options button.
Affine similarity and projective.
Click the spatial adjustment menu and click options.
By default arcmap supports three types of transformations.
Rubber sheeting may improve the value of such sources and make them easier to compare to modern maps.
