How to use the free map
1. Locate the land
Type an address, a postcode or coordinates, or upload your plot as KML, SHP or GeoJSON. The KML of any parcel can be downloaded free from the Spanish Cadastre; with the "Cadastral parcels" layer on you will see its boundaries on the map.
2. Click for the express check
One click returns wind speed at 100 m, solar irradiation, MITECO environmental sensitivity, indicative yield and revenue per hectare, and the nearest substation with its connection capacity. Every value has a traffic light and an explanation.
3. Switch on the layers you need
Existing turbines, power plants, 66 to 400 kV lines, environmental zoning for wind and PV, municipal boundaries, cadastre and land use. Locked layers belong to the paid versions.
What each result means
Thresholds used by the express check. They are screening criteria, not a study: they help you discard sites quickly and see where deeper work is worthwhile.
| Parameter | High / favourable | Medium / limited | Low / difficult | Why it matters |
|---|---|---|---|---|
| Wind speed at 100 m | ≥ 7.5 m/s | 6.5–7.5 m/s | < 6.5 m/s | Turbine output grows with the cube of wind speed: half a metre per second changes the economics. |
| Irradiation (optimum tilt) | ≥ 2,000 kWh/m²·yr | 1,700–2,000 | < 1,700 | Sets the equivalent full-load hours of a PV plant. |
| Environmental sensitivity (MITECO) | Minimal or low | Moderate or high | Very high or maximum | Official zoning for wind and PV; in maximum sensitivity projects are rarely authorised. |
| Wind project revenue | ≥ €15,000/ha·yr | 10,000–15,000 | < 10,000 | Energy sold per hectare. The landowner's rent is a negotiated fraction of it. |
| Solar project revenue | ≥ €50,000/ha·yr | 30,000–50,000 | < 30,000 | Same as above, for PV. |
| Distance to line and substation | ≤ 15 km | 15–30 km | > 30 km | The evacuation line is one of the largest costs and permitting risks. |
| Available connection capacity | ≥ 50 MW | 1–50 MW | < 1 MW | With no free capacity at the substation there is no connection, however good the resource. |
Next step for your case
Landowner
We tell you whether your plot interests a developer and what rent is reasonable. Free; a fee only if a contract is signed.
Assess my landDeveloper or consultancy
Substations with capacity, layout, hourly yield and LCOE/IRR on the same map. Single-site report from €300.
See WindSenseReal estate agency
Per-plot reports under your brand and publication of plots to developers. Pack of 5 reports.
WindSense for agenciesInvestor looking for projects
Land with exclusive contracts and a published preliminary assessment, ready for permitting.
Available projectsRegulatory tracking
New projects, stages and refusals that free up grid capacity, from the BOE and 17 regional gazettes, with alerts by area.
See VigíaFor students and academic work
The map shows how a wind or solar site is chosen in Spain. These are the terms you will see and the official sources the data comes from.
Basic glossary
- Mean wind speed (m/s)
- Annual average at a given height (100 or 150 m, close to the hub of today's turbines). It comes from atmospheric models, not from on-site measurements.
- Capacity factor
- Energy produced in a year divided by what full power all year would produce. Onshore wind in Spain is typically 25–35 %.
- Global irradiation (kWh/m²·yr)
- Solar energy received by one square metre in a year. "Optimum tilt" means tilted at the angle that maximises capture.
- MWh/ha·yr
- Energy a plant would produce per hectare of land occupied. It lets you compare plots of different size.
- Environmental sensitivity
- MITECO's classification of the territory by environmental vulnerability for wind and for PV, from minimal to maximum.
- Substation and connection capacity
- The point where a plant delivers energy to the grid. Connection capacity is the power that can still be connected there; Red Eléctrica and the distribution companies publish it.
- kV (kilovolts)
- Voltage of a power line. 220 and 400 kV are the transmission grid; 66–132 kV is high-voltage distribution.
- DIA
- Environmental impact statement: the ruling that allows or refuses a project after assessing its environmental effects.
Official and open sources
- MITECO: environmental zoning for renewables
- Red Eléctrica: connection capacity by node and system data
- OMIE: hourly electricity market prices
- Cadastre: parcels, areas and uses
- IDAE: renewable energy statistics and guides
- Global Wind Atlas: worldwide wind resource
- PVGIS: irradiation and PV yield
- Daily register of renewable projects (Terra Eolica, free)
- Map of projects with a negative DIA (Terra Eolica, in Spanish)
Map layers and their sources
| Layer | Source | Available |
|---|---|---|
| Wind speed at 150 m (with range filter) | Wind atlas, served by Terra Eolica | Free |
| Power plants by technology and capacity | Terra Eolica database | Free |
| 66, 110, 132, 220 and 400 kV lines | Terra Eolica database | Free |
| Environmental zoning for wind and PV | MITECO (official WMS) | Free |
| Existing wind turbines | Terra Eolica database | Free |
| Administrative boundaries, cadastral parcels, land use | IGN, Cadastre, IDEE (official WMS) | Free |
| Favourable areas (wind + environment) | Terra Eolica analysis | Free |
| Substations with connection capacity, wind direction, landscapes, aeronautical easements, aerodromes | Red Eléctrica and distribution companies, wind atlas, landscape catalogues, AESA | WindSense Pro |
| Projects under permitting, with stage and location | BOE and regional gazettes | Vigía |
Frequently asked questions
Is it really free?
Yes. The express check and every unlocked layer need no registration. Locked layers and project features (layout, financials, reports) are in WindSense and Vigía.
How accurate is the check?
It is indicative: wind and irradiation come from models, not from on-site measurements, and grid distances are computed on public layers. It is meant to discard sites and set priorities; a real project needs measurements and studies.
Is the "revenue" what the landowner would receive?
No. It is the project's energy sales per hectare. The landowner receives an annual rent negotiated by contract, which depends on the resource, the connection and competition for the land. To learn what rent is reasonable to ask, request the free assessment of your land.
What are the locked layers?
Data that belongs to the paid versions: substations with connection capacity, easements, landscape and wind direction in WindSense; projects under permitting in Vigía.
Can I share an assessment?
Yes. The "Copy link" button creates an address with the coordinates; whoever opens it sees the same assessment. Useful for sending a point to a partner or a client.
Do you store my data?
Only if you use the contact form, and only to reply. Details are in the privacy policy and the terms of use.
