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Lieu-dit · Saint-Martin-sous-Montaigu

Le Châtelet

Le Châtelet is a lieu-dit in Saint-Martin-sous-Montaigu, Côte Chalonnaise, Burgundy, whose largest tier is village.

14.3 ha

delimited

372 m

elevation

11.2 h

sun at harvest

Open on the mapWith the boundary, the plots, the sun through the year and the bedrock.

In figures

LevelVillage 67%
Regional 33%inao-aoc-viticoles-bulk (c. 4 September 2026)
VillageSaint-Martin-sous-Montaigu
RegionCôte Chalonnaise, Burgundy
Delimited14.3 hainao-aoc-viticoles-bulk (c. 4 September 2026) · cadastre-etalab (4 September 2026)
Planted9.06 hacadastre-etalab (4 September 2026) · ign-bdtopo-vigne (5 September 2026) · ign-rpg-2024 (5 September 2026)
Parcels133
Grape varietypinot noir / chardonnay also permitted: pinot grisinao-cahiers-des-charges (7 September 2026) · dgddi-superficies-produits (7 September 2026) · franceagrimer-observatoire-viticulture (7 September 2026)
Organic52%agence-bio-cartobio (c. 5 September 2026) · agence-bio-operateurs (5 September 2026)

Place in the village

Among the 21 named plots ranked village in Saint-Martin-sous-Montaigu, from high to low:

sun at harvest 13
elevation 1
slope 14
on the slope 3

Position

372 m

elevation

14.3%

steep

SSE

south-southeast

upper

convex ridge

Elevation372 m 346 to 393 mign-rge-alti (5 September 2026)
Daytime temperature−0.77 °C by day, relative to the village centre at 273 m, ± 0.08 °Cmeteo-france-quotidiennes (6 September 2026) · meteo-france-postes (6 September 2026) · meteo-france-lsh (6 September 2026) · ign-rge-alti (5 September 2026)
Slope14.3% 8.2°ign-rge-alti (5 September 2026)
Aspectsouth-southeast 150°ign-rge-alti (5 September 2026)
On the slope58% upper slope, on a convex ridge, 169 m drains onto itign-rge-alti (5 September 2026)

Bedrock

youngold
  • 10%Bathonian oolite and fine-grained limestone 168–⁠166 million years
  • 72%Bajocian bioclastic limestone 169.5–⁠168.5 million years
  • 17%Lower Bajocian crinoidal limestone 170.9–⁠169.3 million years

Not a borehole: ordered by age, thickness by share of surface.

In the glass. Often linked with firm, long-lived red wine with a taut structure. Several famous parcels lie on it, although the explanation for that lies just as much in slope, fault lines and soil depth.

Limestone consisting almost entirely of broken shell material, formed in moving shallow water on a warm carbonate bank in the Middle Bajocian, roughly 169.5 to 168.5 million years ago. It is hard, porous stone that breaks up into angular blocks, with a coarse-grained, faintly glittering appearance. The famous calcaire à entroques strictly belongs to the Lower Bajocian and on the map falls partly outside this code.

For the vine. Very permeable and stony, with many cracks along which roots can go deep, which helps more in dry years than the small water storage would suggest. Stony soils on this layer warm up quickly, although that is mainly due to the stone cover and the orientation of the slope and not to the limestone itself. The layer is rich in lime, so the rootstock counts, and it works best where the grit is mixed with some marl and fine earth.

Beneath the grands crus of Gevrey-Chambertin lies a sequence running from calcaire à entroques at the bottom via marnes à Ostrea acuminata and clayey limestone to the pierre de Prémeaux at the top; the entroques limestone forms only the lowest band of it.

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: j2b, j2a, j3a.

brgm-bdcharm50 (4 September 2026)

Sun and horizon

07:59

above the hill

19:12

behind the hill

11.2 h

sun at harvest

0.7 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 07:59 above the hill and disappears at 19:12 behind the hill: 11.2 hours of direct sun on a clear day. The ridge reaches 10.7° above the horizon to the north-northeast.

Irradiation+2.7% versus flat land 1,083 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 sky98.8% 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
risesetsunday
21 June06:4920:4914.0 h15.9 h
20 September07:5919:1211.2 h12.3 h
21 December08:5016:287.6 h8.5 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), 34% of the far field is forest (BD Forêt), no buildings.

ign-rge-alti (5 September 2026) · ign-lidarhd-mnh (6 September 2026) · ign-bdforet-v2 (5 September 2026)

Air and cold

62 m

above the lowest point

drains far away

cold air

a gully

4.3 ha flows past

Cold air62 m high on the slope, cold air drains far awayign-rge-alti (5 September 2026)
Cold air passing through4.3 ha a gully, mean over the polygon 0.16 haign-rge-alti (5 September 2026)

Planting

SSE-NNW

down the slope

1.02 m

between the rows

67%

vineyard in 1950

RowsSSE-NNW (151°) down the slope (1°), every 1.02 m, varies by plotmeasured over 5.7 of 9.1 ha plantedign-bdortho (5 September 2026)
Vineyard in 195067% abandoned since: 0.76 ha, rows then ran 44° differentlyassessed over 11.1 ha on the 1950-1965 aerial photographign-photos-historiques-1950-1965 (6 September 2026)

Climate over time

196019802000202012°14°16°

station LA ROCHEPOT, 417 m, 15.5 km away

growing season, April to October: 1951-1980: 14.1 °C, 1991-2020: 15.2 °C

Huglin index: 1951-1980: 1,528, 1991-2020: 1,726

last spring frost: 1951-1980: day 115, 1991-2020: day 108

raw daily series, not corrected for station breaks

Who owns land here

10.7 ha of 14.3 ha delimited is registered to a legal entity

  • SOC CIVILE VITICOLE EMILE VOARICK39%
  • DU DOMAINE DE BLAISY30%
  • GROUPEMENT FONCIER AGRICOLE DES FOURNEAUX3%
  • DE SAINT MARTIN2%
  • GROUPEMENT FONCIER AGRICOLE DES SAZENAY<1%
  • 2 other legal entities<1%
  • private individuals or unknown26%

Private individuals or unknown: 3.66 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

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.