idea Extend Grid of Polygon Features in ArcGIS Pro Ideas

Extend Grid of Polygon Features

DavidCakalic — Thu, 25 Jan 2024 19:22:51 GMT

Problem:

Grid of rectangular polygons created (using Fishnet, Grid Index Features, or another tool.) We now need to come back to this grid and expand its extents to cover a larger area. Grids must remain the same size, and we do not want to rename or modify attributes of the existing features... we just want to extend the rows and columns as needed to fit the new area.

(If possible to extend naming scheme already used... that would be a bonus; but really just getting the new polygons created and aligned would be helpful.)

Array does not appear to work, as the resulting polygons are stair stepped (corner vertices do not align; tried using rotation angle but its not precise enough.) Currently, only method appears to be copy one of the polygons, and manually snap it to an adjacent one..... and do this potentially HUNDREDS OF TIMES.

Re: Extend Grid of Polygon Features

BobBooth1 — Thu, 25 Jan 2024 20:40:11 GMT

You could start editing, select and copy (Ctrl+C) a block of the original polygons and paste (Ctrl+V) it in. Then with the Move tool, move the pasted block so the corners/edges match up.

Re: Extend Grid of Polygon Features

Bud — Fri, 26 Jan 2024 15:53:31 GMT

As a very last resort, you could try doing it in a database view or query layer using SQL. Get the coordinates and add some amount to move the grid squares or generate new squares. That might work in a mobile or enterprise geodatabase, but likely not a file geodatabase.

Or do the equivalent in the field calculator. And recreate the squares from the points using a geoprocessing tool.

Can you provide a screenshot?