Editing & Selection

Reverts the project to its previous state before an edit, selection or layer change (Ctrl/Cmd+Z).

Reapplies the most recently undone change (Ctrl/Cmd+Shift+Z or Ctrl+Y).

Selects features matching an attribute condition such as population, class, date or status; requires a selectable vector layer.

Sets the target layer for the condition, defaulting to source, active or first available layer; results become its selection.

Modifies the current selection using add, remove or intersect methods.

Selects features from the spatial relationship between two layers; requires at least two vector feature layers.

Selects features of the target layer satisfying a spatial predicate: Intersects, Is Within, Contains or Disjoint.

Selects the reference layer whose features provide comparison geometry, excluding the target layer to avoid self-comparison.

Adjusts the map extent to fit the selected features.

Replaces the current selection with the unselected features of the active layer.

Clears all selected features from the active layer.

Creates a new layer containing only the currently selected features.

Draw polygons, lines, rectangles, circles, point markers, freehand sketches, and text labels directly on the map.

Draw polygon footprints with a numeric height; Meratyn renders zoom-gated 3D extrusions while ordinary sketches remain flat.

Copy GeoEditor Sketches into a normal editable GeoJSON layer, preserving style, opacity, visibility, and group; optionally clear Sketches when edit permission allows.

Reshape features by dragging their vertices and move whole features anywhere on the map.

Edit provider-backed layers without loading the full dataset: Meratyn uses bounded geometry windows, exact segment snapping, durable browser recovery, background native publishing, topology checks, and operation-based undo.

Rotate features by dragging or typing an exact angle around a chosen vertex, and resize them with interactive handles.

Cut holes into polygons and split polygons or lines with a dividing line you draw.

Merge several polygons into one, or subtract an overlapping polygon to erase its common area.

Duplicate the selected features in place with the copy and paste keyboard shortcuts.

Reduce the vertex count of selected features while preserving their overall shape.

Capture many features at once with a lasso polygon, then drag, merge, or subtract the whole selection.

Undo and redo up to 50 create, edit, or delete operations with Ctrl+Z and Ctrl+Y.

View and update the attributes of any feature you select during an editing session.

Open a GeoJSON file from disk for editing and download the edited features back as GeoJSON.

Compose MapLibre expressions with a searchable function reference, layer fields, @variables, validation, and live preview.

Fill or create fields from spreadsheet-style expressions using math, text, logic, and $area/$length/$perimeter helpers.

Type cell values straight into the attribute table with per-field validation, then save or discard the edits as a batch.

Add typed fields, rename, reorder, hide, exclude from export, or delete fields across every feature of a layer.

Summarize any field with count, nulls, unique, min, max, mean, median, std dev, sum, and most frequent values.

Profile every field at a glance with fill ratio, numeric ranges, distribution sparklines, and top values.

Plot numeric and categorical fields as histogram, scatter, bar, line, box, or pie charts and export them as PNG or SVG.

Search attribute rows by text and switch between showing every feature or only the current selection.

Configure attribute forms with required, numeric, range, value-map, and expression constraints that validate input.

Write geometry and attribute edits straight back to PostGIS tables with insert, update, and delete tracking. Requires a service.