Meridian GIS

Meridian is a serious GIS for iPad with a scoped iPhone companion for field review. On iPad it feels direct, spatial, precise, and calm. Your maps live in local projects that work completely offline — no account, no cloud, no subscription required to own your data. BUILT AROUND THE MAP A full-bleed MapLibre canvas with floating controls that stay out of the way. Light, dark, navigation, and satellite basemaps; local PMTiles packages for true offline basemaps; and an always-available coordinate grid when you have no network at all. RICH GIS TOOLS AND FEATURES • Import GeoJSON and CSV (with WKT geometry) into layered projects • Layer visibility, ordering, locking, opacity, labels, and definition filters • Attribute tables that stay fast on large layers, with search, sort, and editing • Field calculator with geometry values, arithmetic, and text expressions • Tabular joins (left, inner, full) from CSV tables • Clean WGS84 GeoJSON, KML, and CSV+WKT export — your data comes back out exactly as data, with no internal IDs or app metadata DRAW AND EDIT WITH CONFIDENCE Points, lines, polygons, rectangles, and multipolygons with snapping to vertices and segments. Move features, edit vertices, split lines, and merge features — with undo, validation, and a precision loupe built for Apple Pencil. SPATIAL ANALYSIS THAT TELLS YOU THE TRUTH Nineteen production-scoped tools with honest limits and clear warnings: Select by Attribute and Location, Buffer (geodesically accurate), Clip, Dissolve, Spatial Join, Intersect, Erase, Union, Merge, Append, Snap, Nearest, Network Reachability (catchments along real road networks), Point/Line/Kernel Density, Summarize Within, and Summary Statistics. Every output is a normal layer you can style, query, and export. ASK IN PLAIN LANGUAGE Type what you want — "select residential parcels within 400 m walk of this school", "calculate area for selected parcels", "export selected schools to CSV with WKT" — and Meridian shows a reviewable plan, then opens the right tool already filled in. It runs entirely on your device: no cloud AI, no data leaves your iPad, and nothing executes until you confirm. CARRY IT IN YOUR POCKET A scoped iPhone companion lets you open a project from iCloud, browse the map, toggle layers, edit a feature's attributes, and drop a quick note in the field — then save back with clear conflict handling. Do the heavy editing and analysis on iPad or Mac. STYLE AND COMMUNICATE Single symbols, categorized and graduated styling, fill patterns, labels with offline glyphs, markup notes that never pollute your data, linked charts, and a one-page PDF map layout for sharing. FIELD-READY Foreground-only location with accuracy display, GPS point capture, and vertex capture. No background tracking — ever. YOUR DATA STAYS YOURS Projects are local .gispad packages. Share them as files, export clean GIS formats, and verify everything with the built-in export inspector. Meridian collects no analytics and requires no account. Meridian treats editable data as WGS84/EPSG:4326 and warns about unsupported CRS metadata rather than silently transforming. Density and analysis tools state their accuracy models (geodesic measurement, local azimuthal projections) so you can trust the numbers.