Explore Prosto, Piuro, Sondrio, Italy, with this interactive street and satellite map. You can “grab” the Prosto map and move it around to re-centre it, switch between the standard street map and satellite imagery, and use the zoom buttons to go from the whole province down to street-level detail.
This page also offers a second, independent map. Click the green 🔍 Search Maps button below the map to open OpenStreetMap coverage of the whole of Italy, with a labelled UTM grid drawn the way an IGM 1:25 000 sheet draws it, a distance and bearing tool, and a GPS reading that reports your position in Gauss-Boaga and UTM as well as latitude and longitude. See How to Use This Map below. Local and world news, and the nearby places worth visiting, are further down the page.
Esplora Prosto, Piuro, Sondrio, con questa carta interattiva: puoi trascinare la mappa per ricentrarla, passare dalla veduta stradale a quella satellitare e usare i pulsanti di zoom per scendere fino al dettaglio delle vie.
La pagina offre anche una seconda carta indipendente. Il pulsante 🔍 Search Maps apre la copertura OpenStreetMap di tutta l'Italia, con la griglia UTM quotata come su una tavoletta IGM 1:25 000, lo strumento per misurare distanze e azimut, e la lettura GPS della posizione in Gauss-Boaga e UTM oltre che in latitudine e longitudine.
Map search is available for a limited number of queries per session to manage costs. Be specific — search precisely for best results.
This interactive map shows the street layout and satellite imagery for Prosto, Piuro, Sondrio, Italy. Use the Map and Satellite buttons to switch between the street map and aerial photography. Use the + and − buttons to zoom, or hold the Control key while scrolling the mouse wheel. On a touchscreen, pinch with two fingers. Drag the map to pan anywhere in Piuro, Sondrio or beyond.
Click ⛶ Fullscreen to expand the map to fill the screen. To go back, press Escape, click ✕ Exit Fullscreen above the map, or on a phone tap the back button (Android) or the close icon (iOS).
SEARCH MAPS. The green 🔍 Search Maps button below the map opens a second, independent map on OpenStreetMap coverage of the whole country. Its search box finds any Italian comune, frazione, mountain or landmark by name, so you are not limited to Prosto.
Reading the map like an IGM sheet. Click Grid to lay a labelled UTM grid over the map, quoted along the edges the way a printed IGM 1:25 000 tavoletta quotes it — at normal zoom the squares are one kilometre across, so a six-figure reference can be read by eye and distance judged straight off the map. Click Measure and tap two points for the distance between them with the grid, true and magnetic bearings, the last being the one to set on a compass.
Click 📍 My position for a single GPS fix. It marks where you are and reports it as Gauss-Boaga (the grid printed on the IGM Carta d'Italia), as ETRS89 / UTM (the grid Italy uses today), and as plain latitude and longitude, with a copy button so it can be pasted into a message. It takes one reading and stops, to save the battery. Map tiles need mobile coverage; a GPS reading does not — so the grid reference stays correct in the Apennines and the Alps, where the map itself often will not load.
Usa i pulsanti Map e Satellite per passare dalla carta stradale alla fotografia aerea, i pulsanti + e − per lo zoom, e trascina la mappa per spostarti. Il pulsante 🔍 Search Maps apre una seconda carta su OpenStreetMap con la ricerca di qualsiasi comune, frazione o cima d'Italia, la griglia UTM quotata come su una tavoletta IGM 1:25 000, la misura di distanze e azimut (di griglia, vero e magnetico) e la lettura GPS della posizione in Gauss-Boaga, in ETRS89/UTM e in coordinate geografiche. Le tessere della mappa richiedono la rete mobile, la lettura GPS no: il riferimento resta valido anche dove la carta non si carica.
| Comune | Piuro |
| Province / Provincia | Sondrio |
| Region / Regione | Lombardy (Lombardia) |
| Country / Paese | Italy / Italia |
| Latitude | 46.329479 |
| Longitude | 9.420891 |
| Population 2021 | 926 |
| Altitude | 382 m |
| Type / Tipo | Town or village / Centro abitato |
| River or stream / Fiume o torrente | Fiume Mera (in the place itself / nel luogo stesso) |
| Lake / Lago | Lago del Mottaccio (4.1 km south-east) |
| Reservoir / Lago artificiale | Lago di Villa di Chiavenna (5.7 km east) |
| Nearest summit / Vetta più vicina | Pizzo Guardiello (2.7 km north-west); Pizzo Alto (3.0 km north) |
| Glacier / Ghiacciaio | Cima di Lago Ovest (5.9 km north-east) |
| Pass / Passo | Passo d'Avero (3.3 km north) |
| Valley / Valle | Valle Perandone (0.6 km west) |
Prosto is a village within the comune of Piuro, anchored where the Fiume Mera flows through the landscape. The terrain is shaped by the Valle Perandone and Valle Drana, set against the backdrop of Pizzo Guardiello and Pizzo Alto. The Riserva Naturale Marmitte dei Giganti occupies the local ground, offering a glimpse into the geology of the region. Visitors often pause at the Palazzo Vertemate Franchi, a manor house that holds the weight of its interior stone, or visit the Chiesa di Santa Maria Incoronata. The air here carries a crisp, lingering dampness from the nearby mountains, contrasting with the solid, grounded presence of the valley floors.
Prosto è una frazione del comune di Piuro, adagiata laddove il Fiume Mera attraversa il territorio. Il paesaggio è definito dalla Valle Perandone e dalla Valle Drana, con il Pizzo Guardiello e il Pizzo Alto che dominano l'orizzonte. La Riserva Naturale Marmitte dei Giganti si estende in loco, rivelando le forme aspre scavate nella roccia. Tra le architetture, il Palazzo Vertemate Franchi custodisce sale silenziose e decorate, mentre la Chiesa di Santa Maria Incoronata riflette una devozione discreta. La luce mattutina scivola sulle pareti di pietra, rivelando una quiete operosa che lega il villaggio al ritmo profondo della valle.
Distances are straight-line from the map centre. / Distanze in linea d'aria. Linked names open Wikipedia.
| Comune | Distance | Direction | Population |
| Chiavenna | 2.0 km | south-west | 7,235 |
| Mese | 3.5 km | south-west | 1,824 |
| San Giacomo Filippo | 4.0 km | west | 369 |
| Villa di Chiavenna | 4.6 km | east | 967 |
| Gordona | 5.9 km | south-west | 1,936 |
| Prata Camportaccio | 6.2 km | south | 2,918 |
| Samolaco | 8.4 km | south | 2,886 |
| Campodolcino | 9.7 km | north-west | 928 |
Explore Prosto, Piuro, Sondrio, Italy, with an embedded Google street and satellite map — switch between the two with the buttons on the map. Coordinates: 46.329479, 9.420891. Place names, the comune and provincia hierarchy and the population come from Istat: the administrative boundaries of 1 January 2026 and the 2021 census of inhabited localities. Local and world news feeds keep the page current, and the bilingual description is written from the data this site holds rather than copied from elsewhere. The 30 nearby places listed above are drawn from OpenStreetMap, the IGM toponym database and a curated list checked against Wikipedia.
Search Maps opens a second, independent map. It searches OpenStreetMap for any Italian comune, frazione, mountain or landmark by name; overlays a labelled UTM grid quoted the way a printed IGM 1:25 000 tavoletta quotes it; measures distance with grid, true and magnetic bearings between any two points; and takes a single GPS fix reporting your position as a Gauss-Boaga reference, as ETRS89 / UTM, and as latitude and longitude. Map tiles need mobile coverage, but a GPS position does not, so the grid reference stays correct where the map cannot load.
There is no topographic layer on these pages. The Istituto Geografico Militare serves its Carta d'Italia only inside the EU, so an Italian equivalent of the 1:25 000 walking sheet cannot be shown here — the UTM grid over OpenStreetMap is what stands in its place.
Carta interattiva di Prosto, Piuro, Sondrio, con veduta stradale e satellitare. Toponimi, gerarchia comune/provincia e popolazione provengono dall'Istat: confini amministrativi al 1° gennaio 2026 e censimento 2021 delle località abitate. Il pulsante Search Maps apre una seconda carta su OpenStreetMap con ricerca per nome, griglia UTM quotata come su una tavoletta IGM 1:25 000, misura di distanze e azimut, e lettura GPS in Gauss-Boaga, ETRS89/UTM e coordinate geografiche. Non è presente un livello topografico: l'IGM distribuisce la Carta d'Italia solo all'interno dell'Unione Europea.
| Page built | October 2026 |
| Place data | Istat confini amministrativi and basi territoriali (località abitate, censimento 2021) © Istat (2026) CC BY 4.0. Data modified / Dati modificati: coordinates converted from UTM zone 32N to WGS84; page addresses use unaccented names; officially bilingual names are split into their Italian and minority-language forms. |
| Map layers | Google Maps; © OpenStreetMap contributors; Carta IGM © Istituto Geografico Militare (2026) CC BY 4.0; magnetic declination from NOAA NCEI (World Magnetic Model) |
| Nearby places | © OpenStreetMap contributors (ODbL); landmarks, heritage, protected areas and landscape from IGM DBTI (CC BY 4.0); curated landmark lists verified against Wikipedia |