Shadow Map: Understanding Sun and Shadow on Property
The interactive shadow map shows how neighboring buildings, your own house, trees and walls influence the path of the sun. The date and time can be freely chosen or played as a daily animation.
In a free account for a house, apartment or property with an exact address
Product preview
Shadow map
What you can do
Key features
Loads building floor plans in the area and projects their shadows at the selected time.
Shows sun height, shadow length and direct sun windows for the entire day.
Plays the course of the day and offers quick selection for summer and winter solstices.
Adds trees, walls or other obstacles directly to the map.
Allows estimated building heights to be checked, corrected or removed from the calculation.
Passes relative shadow profiles to solar string planning.
How it works
Step by step
- 1
Load environment
Wertify searches for the buildings around the saved address and marks your own building.
- 2
Check heights
Check particularly close buildings. Estimated heights can be corrected directly.
- 3
Add obstacles
Place trees, walls or clear obstacles on the map and enter approximate dimensions.
- 4
Compare day and season
Move the time slider or start the animation. In particular, compare winter and summer.
- 5
Save scene
Save the checked environment to the object. The solar planner can then use the same shadow profiles for strings and MPPT groups.
What you need
Requirements
- A property with as precise a Swiss address as possible in the Wertify account.
- For more reliable results, approximate heights of nearby buildings, large trees and walls.
Practical guidance
Helpful tips
- Check winter morning and winter afternoon first. This is where long shadows are most noticeable.
- Turn off distant buildings if they obscure the view.
- Only correct an estimated height if you know a more plausible value.
Deliberate limits
What this tool does not do
- Much open map data does not include measured building height. Wertify therefore labels estimated values and makes them editable.
- Trees, terrain, roof structures and new buildings may be missing and must be added if necessary.
- The 2.5D projection is a planning view and not a survey, construction guarantee or professional shading study.
- Apartments can check the surroundings; Changes to the shared roof remain the responsibility of the condominium owner.
Quick answers
Frequently asked questions
Are the shadows accurate?+
No. The position of the sun and projection are calculated geometrically, but the quality depends on the building floor plans and heights. Missing or estimated data remains visibly marked.
Does this make the solar yield more accurate?+
The shadow profiles help with area and string groups. The official BFE roof yield already takes terrain, buildings and vegetation into account; Wertify therefore does not deduct the same shadow again across the board.
Can I draw my own trees or walls?+
Yes. Position, width, depth, height and rotation can be recorded and changed again later.