Contents
How are lines and polygons treated in dxf?
If you import the dxf as layer, you can save it as shapefile, add that to the canvas, and work with that instead of the imported layer. Lines and polygons are treated seperately in shapefiles. So you need a line file and a polygon file. You can transform lines to polygons with Vector -> Geometry tools -> Vector to polygon.
How do you convert a LineString to a polygon?
By calling ReorientObject () on the polygon, it, well… reorients the object. This is a difficult question to answer because you are getting the expected results, but the question asks how to convert a LINESTRING to a POLYGON.
Do you need a line file or a Polygon File in QGIS?
In QGIS, you better work with shapefiles. If you import the dxf as layer, you can save it as shapefile, add that to the canvas, and work with that instead of the imported layer. Lines and polygons are treated seperately in shapefiles. So you need a line file and a polygon file.
Is the 0 layer a closed polygon in QGIS?
The 0 layer contains lines (which make a closed polygon). In each dxf the lines have their color and line width. I do not have autocad or else like. I have Qgis 1.7.4.
How do you select a polygon in ArcGIS?
You can use a variety of selection methods to select the point, line, or polygon features in one layer that are near or overlap the features in the same or another layer. Use the following steps to apply the Select By Location tool.
What do you need to know about a shapefile?
What is a shapefile? A shapefile is a simple, nontopological format for storing the geometric location and attribute information of geographic features. Geographic features in a shapefile can be represented by points, lines, or polygons (areas).
How are feature types converted to geometry types in shapefile?
All feature types in shapefiles convert to geometry types in the geodatabase. Unlike coverages, shapefile feature types are similar to the geometry types stored in a geodatabase, so conversion is more straightforward. For more information, see How data converts when importing. Each of the component files of a shapefile is limited to 2 GB each.
How to convert a line feature to a polygon feature?
Later versions of ArcGIS may contain different functionality, as well as different names and locations for menus, commands and geoprocessing tools. Create a new empty polygon shapefile or feature class, making sure to apply the correct coordinate system. Add the existing line feature and the newly created polygon layer to a map document.
Can you create a polygon from a line?
If you have line features, you can create polygon features from them. For example, you might need to create parcel polygons from lot lines, lakes from shorelines, or street polygons from pavement lines.
How to transform a DWG file into a polygon shapefile?
I am using FME to transform a dwg file into a polygon shapefile (.shp). The dwg file is an urban plan of a city consisting of building blocks (type: polylines) and the properties within each block (type : line). I used the GeometryCoercer transformer to convert type:line to type:polygon but it does not seem to work.