Merge polygon based on other line shapefile PostGIS

How do you merge polygons together?

Note:

1. Click the Edit tool. on the Editor toolbar.
2. Click the features you want to merge. The features must be from the same layer.
3. Click the Editor menu and click Merge.
4. Click the feature that the features will be merged into and will supply the attributes for the merged feature.
5. Click OK.

How do I merge a line and a polygon in ArcGIS?

So, a shapefile cannot contain both lines and polygons.

1. Make your polygon to line feature using “polygon to line” tool in ArcGIS.
2. Use merge tool in ArcGIS to merge your line feature generated by polygon to line tool and your original line feature.
3. Lastly, use feature to polygon tool using your merged feature.

How do I merge adjacent polygons in Qgis?

Merge two polygons and maintain the attributes from the polygon that is selected last.

1. Display the polygon coverage to edit in Edit Tools.
2. On the Edit Polygons menu, click Merge.
3. Select two adjacent polygons. The new polygon has the attributes of the last polygon selected.

How do I merge polygons with the same attribute in Qgis?

Process

1. Click on the Vector menu, Data Management tools, Merge Shapefiles to One
2. Ensure the correct shapefile type is selected (points, lines, or polygons). Select the folder where the two (or more) shapefiles you want to merge are located using the Browse button.

How do you merge polygons within a layer?

Use “Select Features by Area” button -> select the polygons to be merged. Select “Toggle Editing” mode -> then “Merge selected features”
 

How do you combine a polyline with a polygon?

Merge the polyline features in the polyline feature class.

1. Click the Editor drop-down, and click Start Editing. Select the polyline feature class, and click OK.
2. Click the Select tool, and select the polyline feature to be converted to a polygon feature.

How do I merge polygons in GIS?

Verify with the attribute table that the correct polygons are selected. Click Editor, then Start Editing. Click Editor again, then Merge. Check the information in the Merge window, click the text lines and observe the drawing.

Can you get a polygon with two line segments?

A polygon is Closed Simple Made up by line segment We cannot make a closed curve with two line segments. It is not possible.

Can we draw a polygon with two lines?

We know that polygons are closed shapes. Here’s another figure made from two line segments. This is also an open figure. So to draw a polygon, we need at least three sides or three line segments.
 

How do you merge polygons in Autocad?

To Merge AEC Polygons

1. Create two overlapping AEC polygons.
2. Select one of the AEC polygons to be merged.
3. Click AEC Polygon ribbon contextual tab Modify panel Merge.
4. Select the AEC polygon to merge with the first AEC polygon.
5. Enter y (Yes) to erase the second AEC polygon, or n (No) to leave the AEC polygon in the drawing.

How do you intersect two polygons?

Intersection of Convex Polygons Algorithm

1. Create an empty polygon as P.
2. Add all corners of Polygon1 that is inside Polygon2 to P.
3. Add all corners of Polygon2 that is inside Polygon1 to P.
4. Add all intersection points to P.
5. Order all points in the P counter-clockwise.

How do I join two polygons in ArcMap?

2) After adding your feature class to ArcMap, start the edit session. 3) Select the polygons you want to merge (hold the Shift key while selecting the features so that you can select more than one), click the drop down arrow next to “Editor” on the Editor toolbar and click Merge. 4) Save your edits.