[data models] A small, narrow, polygon feature that appears along the borders of polygons following the overlay of two or more geographic datasets.
Tiny sliver polygons or gaps between polygons often result from creating new polygons without using snapping or editing shared boundaries without a topology.
Sliver Polygon A relatively narrow feature commonly occurring along the borders of polygons following the overlay of two or more geographic data sets.
Gap between two lines created erroneously by a scanner and its raster-vector software.
A gap formed when two lines which should be continuous are slightly separated in a graphical representation or map.
Sliver polygons can also be created between features within the same map. Typically, map features are separately digitized. For example, the GIS (or CAD) operator will trace the boundary of each state with a digitizing tablet or mouse.
Sliver polygon - A extremely small polygon, usually of elongated shapes, that results from errors in data capture and overlay analysis when identical linear objects fail to register. It is also known as a spurious polygon.
6. What is Sliver Polygon? Describe how to create sliver polygons and using what function to delete them.
7. Describe what are slope and aspect, how to measure them.
Note: please see Michael L. Hauschild's page for the last three parts.
Conflation - Sliver Removal
Conflation is formally defined as the procedure of reconciling the positions of corresponding features in different data layers. More commonly this is referred to as sliver removal.
Needle Ice A form of periglacial ground ice that consists of groups ice slivers at or immediately below the ground surface. Needle ice is about a few centimeters long.
After finalizing your FMU polygons (or if you encounter "topology" errors when uploading the shapefiles), work with your GIS specialist to ensure that the shapefile is free from slivers and overlap.
the small, invalid polygons are called spurious or sliver polygons and can be a major problem in polygon overlay
spurious polygons arise when two lines are overlaid which are actually slightly different versions of the same line ...
It's likely they have common borders, but slight differences cause 'slivers'.
You should never attempt to digitize over existing edges, because it is likely you will be creating gaps or slivers. Auto-complete is part of the topology tools.
Data corrections were made in the NED assembly process to minimize artifacts, permit edge matching, and fill sliver areas of missing data. This focus piece explores the who, what and where of the NED.
Coincident features (shared arcs) are difficult to locate; they may appear to have one arc between two features, but it turns out to be two arcs, one on top of the other. This should be corrected because it can result in sliver polygons (small gaps ...
sliver p. 114 an artifact of polygon overlay; usually created by overlay of two sources with different accuracy, different sources or different interpretations. slope p.
See also: Information, GIS, Feature, Polygon, Geographic