I have files that representes individual houses and blocks. I want to have a file that represents a residential area in a block.
Is there a way to erase the line, boundaries, between polygons that are adjacent?
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QGIS has two tools to remove boundaries between adjacent (touching) polygons:
Dissolvetool (Processing toolbox > Vector geometry).
dissolvetool will combine all polygons into a single multipolygon feature. You can use the
multipart to singlepartstool to split non-adjacent polygons into single-part features.
Attributes will be lost. After running
multipart to singlepart, You can use the
join attributes by location tool to add the original attributes back to the polygons.
Merge Selected Featurestool (Advanced Digitizing toolbar).
merge selected featuresbutton. Choose what happens to the original attributes (eg, you can concatenate text strings, perform mathematical functions on numerical values, or manually enter a specific value).