Stevens Charles
GIS HW3 Even Questions #1-10
2The three simple features that are used in GIS include the polygon, point or line. A point has no
dimension or size, a line is one dimensional and can measure length. Polygons are 2 dimensional and can
measure length and area.
4There are 6 nodes in figure 3.10
6Topology is important for GIS because it ensures data quality, there are no gaps or overlaps in the data.
With this, it allows GIS to be more accurate when representing data
8Georelational data stores data in both figures and tables. These data points are then linked by feature
ID. In terms of the object based data model, has only one database. Both spatial and attribute data are
stored in one database.
10The relationship between geodatabases, feature classes and feature data sets are: Feature data sets are
located within the geodatabase. While feature classes are located in the feature data sets. The feature
classes in the feature data set have similar coordinates.
TASKS
Q1 – The difference between a shapefile and a coverage is what they represent. A shapefile simply
shows a location of the geographical figure. While, a coverage stores all vector data. (points , lines, and
polygons)
Q2- By using “land”, we will be able to see how coverages store data. The two systems are spatially,
where it is possible to view the requested shapefile through a table. The second cycle is through tables.
Q3 Besides shapefiles, it is possible to add import coverages and CAD data to a geodatabase.