Lieu-dit · Tracy-sur-Loire
Le Champ de Lopin
Le Champ de Lopin is a lieu-dit in Tracy-sur-Loire, Nivernais, Centre-Loire, whose largest tier is village.
12.8 ha
delimited
166 m
elevation
11.8 h
sun at harvest
Open on the mapWith the boundary, the plots, the sun through the year and the bedrock.
In figures
| Level | Villageinao-aoc-viticoles-bulk (c. 4 September 2026) |
|---|---|
| Village | Tracy-sur-Loire |
| Region | Nivernais, Centre-Loire |
| Delimited | 12.8 hainao-aoc-viticoles-bulk (c. 4 September 2026) · cadastre-etalab (4 September 2026) |
| Planted | 9.47 hacadastre-etalab (4 September 2026) · ign-bdtopo-vigne (5 September 2026) · ign-rpg-2024 (5 September 2026) |
| Parcels | 50 |
| Grape variety | sauvignoninao-cahiers-des-charges (7 September 2026) · dgddi-superficies-produits (7 September 2026) · franceagrimer-observatoire-viticulture (7 September 2026) |
| Organic | 19%agence-bio-cartobio (c. 5 September 2026) · agence-bio-operateurs (5 September 2026) |
Place in the village
Among the 67 named plots ranked village in Tracy-sur-Loire, from high to low:
Position
166 m
elevation
3.7%
gentle
SW
southwest
mid-slope
even slope
| Elevation | 166 m 159 to 178 mign-rge-alti (5 September 2026) |
|---|---|
| Slope | 3.7% 2.1°ign-rge-alti (5 September 2026) |
| Aspect | southwest 220°ign-rge-alti (5 September 2026) |
| On the slope | 33% mid slope, on an even plane, 178 m drains onto itign-rge-alti (5 September 2026) |
Bedrock
- 30%Recent alluvium of the valley floors 0.12–0 million years
- 9%Alluvium and colluvium of valley floors and footslopes circa 0,12 tot heden
- 61%Upper Kimmeridgian limestone and marl about 152–149 million years (approximation, regional division)
Not a borehole: ordered by age, thickness by share of surface.
In the glass. Tends towards somewhat straighter, less broad wine than the marl-rich lower part of the slope. The difference is subtle and in practice is overshadowed by position and soil depth.
The upper part of the same Kimmeridgian package, roughly 152 to 149 million years old. Here too limestone beds and marls alternate, but higher in the sequence the limestone beds gain in weight and hardness, towards the much harder Portlandian limestones that cap the plateaux. The French map term Kimmeridgien is a regional division and does not coincide exactly with the international stage (154.8 to 149.2 million years), so the age given is an approximation.
For the vine. Slightly less water-retentive and slightly stonier than the marl-rich base below, often with a thinner soil and more loose limestone grit at the surface. That gives fast drainage and a soil that warms up readily, but the reserve for a dry August is smaller. A high active lime content remains a point of attention.
Found at the upper edge of the Chablis slopes, where the package passes into the hard Portlandian limestones of the plateaux.
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: j7, Fy, FC.
brgm-bdcharm50 (4 September 2026)Sun and horizon
07:53
above the hill
19:38
behind the hill
11.8 h
sun at harvest
Grey: sun up, behind the hill or its own slope.
Around harvest the sun rises here at 07:53 above the hill and disappears at 19:38 behind the hill: 11.8 hours of direct sun on a clear day. The ridge reaches 3.2° above the horizon to the east-southeast.
| Irradiation | +0.8% versus flat land 1,036 kWh/m² from April to October, 44% 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, the caveat
| rise | set | sun | day | |
|---|---|---|---|---|
| 21 June | 06:09 | 21:33 | 15.4 h | 15.9 h |
| 20 September | 07:53 | 19:38 | 11.8 h | 12.3 h |
| 21 December | 08:57 | 16:51 | 7.9 h | 8.5 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), 22% of the far field is forest (BD Forêt), no buildings.
Air and cold
8 m
above the lowest point
comes close
cold air
a main drain
328.9 ha flows past
| Cold air | 8 m low on the slope, cold air comes closeign-rge-alti (5 September 2026) |
|---|---|
| Cold air passing through | 328.9 ha a main drain, mean over the polygon 8.94 haign-rge-alti (5 September 2026) |
Planting
SSE-NNW
across the slope
1.30 m
between the rows
100%
vineyard in 1950
| Rows | SSE-NNW (148°) across the slope (71°), every 1.30 m, slightly fannedmeasured over 9.5 of 9.5 ha plantedign-bdortho (6 September 2026) |
|---|---|
| Vineyard in 1950 | 100% abandoned since: 2.75 haassessed over 10.2 ha on the 1950-1965 aerial photographign-photos-historiques-1950-1965 (6 September 2026) |
Climate over time
station COURS LES COSNE, 196 m, 13.2 km away
raw daily series, not corrected for station breaks
The name
- champ
- field, from Latin campus. The third most common element in this atlas and usually descriptive: open arable land, often predating the vines. Work and use · Terroirium, Eigen telling over de namen in deze atlas (2026)
This is about the words, not about this plot: the same name can have arisen differently elsewhere.
Who owns land here
1.52 ha of 12.8 ha delimited is registered to a legal entity
- GFA MOLLET-MAUDRY5%
- GROUPEMENT FONCIER AGRICOLE CAILBOURDIN2%
- SCEA DOMAINE LES COTEAUX2%
- COMMUNE DE TRACY SUR LOIRE1%
- JACQUES MARCHAND1%
- 2 other legal entities1%
- private individuals or unknown88%
- 0.59 ha GFA MOLLET-MAUDRY GFA · land company
- 0.28 ha GROUPEMENT FONCIER AGRICOLE CAILBOURDIN GFA · land company
- 0.24 ha SCEA DOMAINE LES COTEAUX SCEA · wine business
- 0.16 ha COMMUNE DE TRACY SUR LOIRE COM · public
- 0.11 ha JACQUES MARCHAND SARL · other · organic
- 0.08 ha GREBET PERE ET FILS AUPM · other · other right
- 0.06 ha LANGLOIS ET HUBERT BROCHARD SAS · other
Private individuals or unknown: 11.3 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 Perriere Botte Village · 300 m
- Les Mardrelles Village · 350 m
- Le Champ de la Torche Village · 350 m
- Les Barboulottes Village · 400 m
- Les Prés de Berge Village · 450 m
- Les Debrettes Village · 500 m
- Les Rechines Caillottes Village · 500 m
- Le Champ Fromentin Village · 500 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.