Lieu-dit · Chemilly-sur-Serein
Vallée Jacques
Vallée Jacques is a lieu-dit in Chemilly-sur-Serein, Chablis en Grand Auxerrois, Burgundy, whose largest tier is regional.
2.29 ha
delimited
215 m
elevation
10.5 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 | Chemilly-sur-Serein |
| Region | Chablis en Grand Auxerrois, Burgundy |
| Delimited | 2.29 hainao-aoc-viticoles-bulk (c. 4 September 2026) · cadastre-etalab (4 September 2026) |
| Planted | 1.45 hacadastre-etalab (4 September 2026) · ign-bdtopo-vigne (5 September 2026) · ign-rpg-2024 (5 September 2026) |
| Parcels | 19 |
| Grape variety | chardonnayinao-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 5 named plots ranked regional in Chemilly-sur-Serein, from high to low:
Position
215 m
elevation
21.9%
very steep
ENE
east-northeast
upper
convex ridge
| Elevation | 215 m 201 to 231 mign-rge-alti (5 September 2026) |
|---|---|
| Daytime temperature | +0.11 °C by day, relative to the village centre at 233 m, ± 0.02 °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 | 21.9% 12.4°ign-rge-alti (5 September 2026) |
| Aspect | east-northeast 74°ign-rge-alti (5 September 2026) |
| On the slope | 57% upper slope, on a convex ridge, 278 m drains onto itign-rge-alti (5 September 2026) |
Bedrock
- 23%Astarte limestone, Lower Kimmeridgian 155–152 million years
- 77%Limestone of Tonnerre, Upper Oxfordian about 158–155 million years
Not a borehole: ordered by age, thickness by share of surface.
In the glass. In Chablis and the Tonnerrois ground for light, fresh white wine on the highest plots; the core of Chablis stands on the Kimmeridgian marl beneath. The scree from this limestone (GP, E) matters more to the vineyard than the slab itself.
White, fine-grained, partly oolitic limestone, 55 to 80 metres thick, deposited on a warm, shallow platform in the Upper Oxfordian. It is the famous building stone of Tonnerre and the hard plateau cap above the Serein and the Armançon; the same unit as j6a and j6aT on other map sheets.
For the vine. Shallow, hard and strongly draining, with a high lime content: dry, quick to warm, little root space. Where it forms the plateaus around Chablis it is mainly woodland and arable land; vineyards lie on the edge and on the scree derived from it.
Chablisien and Tonnerrois: Chichée, Chemilly-sur-Serein, Poilly-sur-Serein, Irancy, Saint-Bris-le-Vineux, Vincelottes, Saint-Cyr-les-Colons, Tonnerre, Molosmes, Val-de-Mercy, Deux-Rivières.
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: j5T-j7a, j7b.
brgm-bdcharm50 (4 September 2026)Sun and horizon
07:37
above the hill
18:06
behind the hill
10.5 h
sun at harvest
0.6 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 07:37 above the hill and disappears at 18:06 behind the hill: 10.5 hours of direct sun on a clear day. The ridge reaches 18.1° above the horizon to the west. The relief costs 0.6% of the irradiation from April to October, direct and diffuse together.
| Irradiation | −3.8% versus flat land 971 kWh/m² from April to October, 46% 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 | 98.3% 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 | 06:10 | 19:44 | 13.6 h | 16.0 h |
| 20 September | 07:37 | 18:06 | 10.5 h | 12.3 h |
| 21 December | 09:19 | 14:53 | 5.6 h | 8.4 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), 29% of the far field is forest (BD Forêt), no buildings.
The irradiation loss does include clouds: the average of 2005 to 2023 (PVGIS-SARAH3, EU JRC), not any particular year.
Air and cold
37 m
above the lowest point
drains far away
cold air
a combe
16.3 ha flows past
| Cold air | 37 m high on the slope, cold air drains far awayign-rge-alti (5 September 2026) |
|---|---|
| Cold air passing through | 16.3 ha a combe, mean over the polygon 0.64 haign-rge-alti (5 September 2026) |
Planting
E-W
down the slope
1.13 m
between the rows
100%
vineyard in 1950
| Rows | E-W (96°) down the slope (22°), every 1.13 m, varies by plotmeasured over 1.4 of 1.5 ha plantedign-bdortho (5 September 2026) |
|---|---|
| Vineyard in 1950 | 100% abandoned since: 0.38 haassessed over 2.8 ha on the 1950-1965 aerial photographign-photos-historiques-1950-1965 (6 September 2026) |
Climate over time
station CHABLIS_SAPC, 141 m, 7.7 km away
raw daily series, not corrected for station breaks
The name
- val
- valley. Vaux and vau are the same root in the plural and in older form. Relief · Frédéric Godefroy, Dictionnaire de l'ancienne langue française (1881)
This is about the words, not about this plot: the same name can have arisen differently elsewhere.
Who owns land here
0.73 ha of 2.29 ha delimited is registered to a legal entity
- VILLAIN-BLESSON25%
- DOMAINE DES QUATRE SAISONS7%
- private individuals or unknown68%
- 0.58 ha VILLAIN-BLESSON GFA · land company
- 0.16 ha DES QUATRE SAISONS GFA · land company
Private individuals or unknown: 1.56 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
- Vau Malot Regional · 100 m
- Tete du Vau Malot Regional · 150 m
- La Perriere Regional · 450 m
- Vaux de l'Arche Regional · 700 m
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.