FAQ

No. Everything runs locally in your browser for privacy and speed. We only transmit geometry if you sign in and choose Save or Send to Dashboard; Load just retrieves your own previously saved items.

Draw polygons, edit vertices, select with click or lasso, union/merge, subtract (by draw or paste/upload), dissolve, split MultiPolygons, buffer (km), simplify (meters), validate, and export to WKT/GeoJSON/Shapefile.

Click Add → choose File (WKT/GeoJSON/Shapefile .zip) or Paste (WKT/GeoJSON). The editor will import Polygon/MultiPolygon features.

In the list (right sidebar), click Edit next to a geometry, drag vertices, then Save.

Yes—click Zoom next to an item in the right sidebar.

Yes. Click Undo in the left toolbar. Most operations push a snapshot so you can safely experiment.

At the bottom of the right sidebar, use Save to store your current/selected geometry to your ClearSKY account’s Cloud Library, Load to reopen something you saved before, and Send to Dashboard to save and open the Dashboard with your AOI prefilled for ordering.

Toggle Select (left toolbar) to use click or lasso. Click a shape to select; draw a polygon to lasso-select intersecting shapes.

Right-click a selected shape (or lasso with right mouse button) to remove it from the selection. You can also uncheck boxes in the right sidebar.

Use the master checkbox above the list (right sidebar) to select all or clear selection.

Click Invert in the left toolbar (Selection section).

Toggle Delete (left toolbar) and click a Polygon to remove it. For MultiPolygons, click a specific part to remove just that part.

Select 2+ shapes → click Combine (union). The result becomes one geometry.

Select a MultiPolygon → click Dissolve. It merges overlapping/adjacent parts within that MultiPolygon.

Combine merges multiple selected geometries into one. Dissolve merges parts within one MultiPolygon. Use Combine for separate items; Dissolve for parts of a single MultiPolygon.

Select one or more shapes → toggle Subtract (draw) → sketch the area to cut away. The drawn polygon is subtracted from the selection.

Select shapes → click Subtract → paste WKT/GeoJSON or upload a .zip Shapefile. The polygon(s) are sequentially subtracted from your selection.

Select the MultiPolygon → click Split. Each part becomes its own Polygon in the list.

Select shapes → click Buffer → enter a distance in kilometers. The result replaces the original shapes in the selection.

Select shapes → click Simplify → enter a tolerance in meters. Optionally use High Quality (DP-only) mode. You can Undo if you over-simplify.

WKT, GeoJSON (.geojson/.json), and zipped ESRI Shapefile (.zip). The editor imports Polygon and MultiPolygon features.

WKT (as a GEOMETRYCOLLECTION), GeoJSON (FeatureCollection), and ESRI Shapefile (.zip). You can export all shapes or only your selection.

Toggle Export selection only (footer of the right sidebar). Then click Download for WKT, GeoJSON, or Shapefile.

Exports include geometry with empty properties. If you need attributes, add them later in a GIS.

Yes—use Copy under WKT/GeoJSON in the Export section, or Copy next to an item in the list.

All input/output uses WGS84 (EPSG:4326) longitude/latitude. Buffer distances are in kilometers.

Polygon and MultiPolygon. Points/lines are ignored on import and not exported.

All Polygon/MultiPolygon features are imported as individual items in the list.

When adding geometry, the validation modal reports issues like unclosed rings, holes, or duplicates. You can apply fixes before proceeding.

Use Fix self-intersections in the validation modal, then Proceed. This applies a tiny buffer-clean to repair geometry.

Use Remove interior rings in the validation modal. This converts holes into standalone Polygons (as a MultiPolygon) that you can add to the map.

Duplicates are identical rings or parts repeated in a geometry. Removing them prevents invalid topology that can break union/buffer.

Closed rings are required for valid Polygons/MultiPolygons. Non-closed rings can cause errors in operations and exports.

If the subtraction geometry fully covers a selected shape, it’s removed. Undo to restore, or subtract a smaller area.

Open Overlay → enter a tile URL like https://server/{z}/{x}/{y}.png → Add tiles.

Yes—Overlay → choose a .geojson/.json file, then Add GeoJSON.

Yes—Overlay → choose a .tif/.tiff. EPSG:4326 or 3857 works best. Very large rasters can be slow in the browser.

Use the Opacity slider (left toolbar → Overlays).

Click Clear in the Overlays section of the left toolbar.

The basemap shows attribution (OpenStreetMap/Carto). If you add custom tiles, follow the provider’s attribution rules.

No. Editing and exporting work without an account. A ClearSKY login is optional and only needed for Save, Load, or Send to Dashboard.

We store the geometry you choose (all or selection) as GeoJSON in your Cloud Library along with the name you provide. We do not store your basemap, overlays, or any unrelated data.

The geometry is saved to your account (like Save) and the ClearSKY Dashboard opens with your AOI prefilled so you can configure and submit an order.

Use Load to open your Cloud Library. You can delete items there. Orders already created in the Dashboard keep their own copies.

We do not log anonymous editing actions. When you sign in and use Save/Load/Send, we record standard account metadata and the saved item itself so those features work. Otherwise, your work remains private in your browser.

Yes. The app runs entirely in your browser and does not upload geometry unless you explicitly choose Save or Send to Dashboard. Loading retrieves only your own saved items.

No tracking for anonymous use. Authentication sets session cookies only if you log in to use Save/Load/Send.

Once the page is loaded, many actions continue to work offline. Refreshing the page will clear your in-memory work—export before you refresh.

Latest Chrome, Edge, Firefox, and Safari are recommended. Mobile works, but desktop offers a better editing experience.

Use Simplify (meters) to reduce vertices, split very large AOIs, hide overlays, or work on smaller batches. Undo lets you experiment safely.

Buffers are computed in kilometers over WGS84. For legal or survey-grade precision, validate results in a GIS with appropriate projections.

Limits depend on your browser memory. Extremely large files may be slow or fail to parse—split or simplify before importing.

Your exported geometry is yours. Basemap/overlay tiles may have their own licenses; check your provider.

Ensure input is valid WKT or GeoJSON (Feature/FeatureCollection) with Polygon/MultiPolygon types only.

Try fixing topology first (validation modal). Self-intersections or duplicate rings can break unions.

Spherical buffering on lon/lat can distort at extreme latitudes or very large distances. Use smaller buffers or verify in a projected GIS.

Some browsers block clipboard access. Download as a file instead, or enable clipboard permissions.

Work is stored in memory only. Use Export (WKT/GeoJSON/Shapefile) to save your progress before refreshing.