Meridian GIS

Meridian is a local-first GIS workspace for iPad: open, inspect, edit, style, analyse, validate, and export spatial data in local project files, built for map-first GIS work away from the desk.

FREE TO TRY, ONE-TIME PRO UNLOCK
Download free and work on your own data within free-tier limits. A single one-time Meridian Pro purchase lifts those limits and unlocks analysis tools, the Workflow Builder, charts, and PDF output. No account, no subscription.

LOCAL PROJECTS, OFFLINE
Your work lives in local .gispad packages that open and edit completely offline. No analytics - your data stays on your iPad unless you share it.

A MAP-FIRST, TOUCH WORKSPACE
A full-bleed MapLibre map with floating controls that stay out of the way. Draw and edit with touch and Apple Pencil, with a precision loupe. Squeeze Apple Pencil Pro for a tool palette at your fingertip. Use online basemaps, local PMTiles, or a no-network coordinate grid.

INSPECT AND EDIT
Fast attribute tables with find and replace, a feature inspector, field forms, and attribute editing. Draw and edit points, lines, polygons, and rectangles with snapping, vertex editing, split, merge, and undo/redo. Fill text fields by scanning a label or barcode with the camera, or on iPadOS 27 by writing with Apple Pencil - both validated like typing.

FIELD WORK
Record GPS tracks as you walk, with honest pause and resume and one-tap Share as GPX; with Meridian Pro a track keeps recording while the screen is locked, visible on the Lock Screen. Guided capture records GPS-averaged points and streamed lines with the layer's own form. Import geotagged photos and attach photos to features without leaking into exports. Read positions as decimal degrees, DMS, UTM, or MGRS from Go To, with ground elevation when 3D terrain is on.

RASTER, TERRAIN, AND TIME
Import GeoTIFF rasters with hillshade, slope, and colour relief presets. Turn on 3D terrain with adjustable exaggeration. Animate layers through time with a slider driven by date fields, and author labels and symbology with expressions.

IMPORT, EXPORT, AND CONNECTED DATA
Import GeoJSON, CSV, GeoPackage, KML/KMZ, GPX, Shapefile, and read-only Esri File Geodatabase. Add public data from Natural Earth, OpenStreetMap, US Census, and GeoNames, or import a copy from OGC API - Features, WFS, and ArcGIS Feature Services. Export clean GeoJSON, GeoPackage, KML/KMZ, GPX, Shapefile, and CSV+WKT, checked by an export inspector.

CRS-AWARE
Layers are stored in WGS84. Meridian detects projected data on import, transforms common systems and UTM zones, and offers Define-CRS and reproject tools with per-layer provenance and an in-app CRS guide.

ANALYSIS AND WORKFLOWS
Buffer (outward, inward, or a ring between), clip, dissolve, convex hull, spatial join, select by location, density, network reachability, summarize within, hot spot analysis, spatial autocorrelation, mean centre, interpolation, tessellations, spatial binning, and points-to-line/multipart conversions. Chain tools in a visual Workflow Builder and rerun the saved chain later. Select features with an expression and keep it as the layer's filter in one tap.

STYLE, CHARTS, AND REPORTS
Single-symbol, categorized, and graduated styling with custom marker shapes, patterns, heatmaps, extrusion, clustering, and offline labels. Charts that link back to your selection. Markup notes that never change your data, a PDF map layout, and multi-page Map Brief reports.

ASK IN PLAIN LANGUAGE
Type a request and the on-device command planner proposes a reviewable plan, then opens the right tool filled in. With Apple Intelligence, Apple's on-device model can read your request first - still checked by the same planner, still on your device. Nothing runs until you confirm.

ONE UNIVERSAL APP
A scoped iPhone companion views projects, toggles layers, edits attributes, and drops a note. Full editing lives on iPad.

Meridian is a focused, local-first companion, not a replacement for desktop or enterprise GIS.