Lieu-dit · Bonnay-Saint-Ythaire
Les Garets
Les Garets is a lieu-dit in Bonnay-Saint-Ythaire, Mâconnais, Burgundy, whose largest tier is regional.
12.7 ha
delimited
285 m
elevation
11.5 h
sun at harvest
Open on the mapWith the boundary, the plots, the sun through the year and the bedrock.
In figures
| Level | Regionalinao-aoc-viticoles-bulk (c. 4 September 2026) |
|---|---|
| Village | Bonnay-Saint-Ythaire |
| Region | Mâconnais, Burgundy |
| Delimited | 12.7 hainao-aoc-viticoles-bulk (c. 4 September 2026) · cadastre-etalab (4 September 2026) |
| Planted | 1.83 hacadastre-etalab (4 September 2026) · ign-bdtopo-vigne (5 September 2026) · ign-rpg-2024 (5 September 2026) |
| Parcels | 31 |
| Grape variety | chardonnay, pinot noir, pinot blanc, pinot gris, aligoté, melon, sacy also permitted: gamayinao-cahiers-des-charges (7 September 2026) · dgddi-superficies-produits (7 September 2026) · franceagrimer-observatoire-viticulture (7 September 2026) |
| Organic | 0%agence-bio-cartobio (c. 5 September 2026) · agence-bio-operateurs (5 September 2026) |
Place in the village
Among the 14 named plots ranked regional in Bonnay-Saint-Ythaire, from high to low:
Position
285 m
elevation
10.6%
firm
SSE
south-southeast
mid-slope
convex ridge
| Elevation | 285 m 260 to 314 mign-rge-alti (5 September 2026) |
|---|---|
| Daytime temperature | +0.16 °C by day, relative to the village centre at 306 m, ± 0.03 °Cmeteo-france-quotidiennes (6 September 2026) · meteo-france-postes (6 September 2026) · meteo-france-lsh (6 September 2026) · ign-rge-alti (5 September 2026) |
| Slope | 10.6% 6.0°ign-rge-alti (5 September 2026) |
| Aspect | south-southeast 149°ign-rge-alti (5 September 2026) |
| On the slope | 39% mid slope, on a convex ridge, 146 m drains onto itign-rge-alti (5 September 2026) |
Bedrock
- 11%Bathonian oolite and fine-grained limestone 168–166 million years
- 87%Bajocian crinoidal limestone (Calcaire à entroques) 171–168 million years
Not a borehole: ordered by age, thickness by share of surface.
In the glass. Associated in the trade with taut, sharply defined wine. Here too the mechanism is above all the thin, stony, warm and well-drained profile, not the calcite of the sea lilies themselves.
Limestone built up from the broken stem segments of sea lilies, animals that stood in dense fields on a shallow, well-flushed seabed. The debris piled up into coarse, granular beds that glitter in the light from the calcite crystals and feel almost like a sandstone. Bajocian, about 171 to 168 million years old.
For the vine. Coarse-grained and relatively porous, breaking down into angular stones and a granular, free-draining soil that warms quickly. The water reserve in the rock itself is small, so what carries the vine through the summer is usually the clay or marl band beneath, or the colluvium above. The active lime content is high, with a real chlorosis risk.
Forms the lowest hard bed of the Côte and outcrops in the combes and at the bottom of the slope; also widespread in the Mâconnais.
BRGM geological map at 1:50,000. It tells vineyards apart, not plots within a vineyard. The link between rock and taste is indirect: soil depth, water and warmth do the work, and slope, vine age and the cellar do the rest. Units on that map: j2, j3a.
brgm-bdcharm50 (4 September 2026)Sun and horizon
07:30
above the hill
18:58
behind the hill
11.5 h
sun at harvest
0.5 h
lost to the hill
Grey: sun up, but behind the hill or the vineyard's own slope.
Around harvest the sun rises here at 07:30 above the hill and disappears at 18:58 behind the hill: 11.5 hours of direct sun on a clear day. The ridge reaches 8.1° above the horizon to the west.
| Irradiation | +2.2% versus flat land 1,081 kWh/m² from April to October, 41% of it diffuseunder the average cloudiness of 2005 to 2023 (PVGIS-SARAH3, EU JRC); direct, diffuse and reflected light togetherign-rge-alti (5 September 2026) · ign-lidarhd-mnh (6 September 2026) · ign-bdforet-v2 (5 September 2026) · jrc-pvgis-sarah3 (10 September 2026) |
|---|---|
| Open sky | 99.8% of the sky the slope itself sees; the surrounding relief blocks the restign-rge-alti (5 September 2026) · ign-lidarhd-mnh (6 September 2026) · ign-bdforet-v2 (5 September 2026) |
Three reference days and the caveat
| rise | set | sun | day | |
|---|---|---|---|---|
| 21 June | 06:12 | 20:46 | 14.6 h | 15.8 h |
| 20 September | 07:30 | 18:58 | 11.5 h | 12.3 h |
| 21 December | 08:24 | 16:23 | 8.0 h | 8.6 h |
Computed from the IGN elevation model at 5 m: horizon in 36 directions up to six kilometres, sun position per minute, angle of incidence on the mean slope. Clear sky, with the tree canopy from the IGN forest inventory as a raised horizon (15 m closed forest, 5 m heath, trees within 60 m ignored), 27% of the far field is forest (BD Forêt), no buildings.
Air and cold
34 m
above the lowest point
drains far away
cold air
a gully
5.3 ha flows past
| Cold air | 34 m high on the slope, cold air drains far awayign-rge-alti (5 September 2026) |
|---|---|
| Cold air passing through | 5.3 ha a gully, mean over the polygon 0.18 haign-rge-alti (5 September 2026) |
Planting
SE-NW
down the slope
1.20 m
between the rows
61%
vineyard in 1950
| Rows | SE-NW (139°) down the slope (10°), every 1.20 m, varies by plotmeasured over 1.8 of 1.8 ha plantedign-bdortho (5 September 2026) |
|---|---|
| Vineyard in 1950 | 61% abandoned since: 4.37 ha, planted since: 1.58 haassessed over 9.1 ha on the 1950-1965 aerial photographign-photos-historiques-1950-1965 (6 September 2026) |
Climate over time
station MT-ST-VINCENT, 601 m, 13.0 km away
growing season, April to October: 1951-1980: 13.5 °C, 1991-2020: 15.1 °C
Huglin index: 1951-1980: 1,248, 1991-2020: 1,553
last spring frost: 1951-1980: day 107, 1991-2020: day 101
series homogenised through 2022
Who owns land here
1.24 ha of 12.7 ha delimited is registered to a legal entity
- LES VIGNES DEVANT6%
- COMMUNE DE BONNAY3%
- private individuals or unknown90%
- 0.81 ha LES VIGNES DEVANT GFA · land company
- 0.43 ha COMMUNE DE BONNAY COM · public
Private individuals or unknown: 11.5 ha.
Share of the delimited hectares. Only legal entities are public in France; everything else stays unnamed. From the public register of legal entities (DGFiP), as of 1 January 2025. The owner is not always the one who works the vineyard: tenancy is common.
Nearby lieux-dits
- La Croix Blanche Regional · 300 m
- Le Merle Regional · 300 m
- Le Creux du Merle Regional · 450 m
- Au Champ Beau Regional · 500 m
- Soufflerie Regional · 600 m
- Au Clos Regional · 650 m
- Au Champ Vincent Regional · 650 m
- En Monternaud Regional · 1.1 km
In the same village, measured between label points. That does not say which ones border each other; the map shows that.
Where each figure comes from
- Classification
- The INAO delimitation per denomination, cut against the cadastral parcel. Only the INAO's own plans are legally binding; this map is informational.
- Area
- Computed on the sphere from longitude and latitude (turf.area), not in Lambert-93. For an appellation this is the union of the INAO polygons across commune boundaries, measured on the unclosed geometry; the fifteen metres used to close the outline for the map are not counted. For a climat it is the union of the cadastral lieu-dit polygons with that name.
- Planted
- Parcel area times vineyard cover, where cover comes from the IGN vegetation layer supplemented by the agricultural declaration. Checked against the customs harvest declarations: median deviation 5.1 per cent over a hundred appellations.
- Elevation
- Mean of the elevation-model cells whose centre falls inside the polygon, on a 5 m grid.
- Slope
- Per-cell slope from the elevation model using Horn's method, then averaged over the cells in the polygon.
- Aspect
- Vector mean of the per-cell aspect. A plain average would turn north-east and north-west into south.
- Sun at harvest
- Hours of direct sun on 20 September under a clear sky, with the horizon in 36 directions out to six kilometres and the height of woods and buildings on top of it. Canopy height is measured where LiDAR HD covers the area and estimated from BD Forêt where it does not; the panel states which of the two was used.
- Grape variety by appellation
- Per appellation and colour the permitted varieties from the approved cahier des charges; per appellation and tier the declared hectares of white and red from the customs harvest declaration (product codes). One colour permitted: the main variety of that colour. Two colours: from 85 percent of the hectares that colour applies, in between it is called mixed. Champagne: the dominant variety from the planted hectares per variety per commune from FranceAgriMer. Per polygon the dominant variety of its parts by area. Derived, not measured: the variety per plot exists only in the customs vineyard register, which is not public. In a two-colour appellation a single plot may carry the other variety. Customs withhold small appellations (statistical secrecy), in which case the split is missing.
- Bedrock
- The geological unit covering the largest share of the polygon, from the 1:50,000 geological map. At 1:50,000 the map separates one climat from another, but not what varies inside a climat.
- Organic
- Share of the area certified organic or in conversion, from the CartoBio plot register.