Step 1: Import Layout
Insert the floor plan or plot image into GeoGebra.
Method
Open GeoGebra Geometry or Classic
Insert image
place image near origin
lock image after positioning
Step 2: Set Scale
Use one known dimension.
Example
If one wall is 10 meters
draw a GeoGebra line of 10 units
resize imported plan proportionally
match the known wall length
Without scaling, the grid may look correct visually but will not be technically dependable.
Step 3: Establish True North
Take true north from Google Earth.
Important
Do not rely blindly on a hand-held magnetic reading unless verified.
Draw
vertical North-South axis
horizontal East-West axis
These become the master reference.
Step 4: Rotate Layout to Actual Orientation
If the property is tilted relative to north
rotate the imported layout by the exact angle
align actual property north with GeoGebra north
This is one of the most important steps.
Step 5: Mark Property Boundary
Trace the plot or built area.
Use
polygon tool
segment tool
point tool
Create
outer plot boundary
built structure boundary
room outlines if needed
Step 6: Find Geometric Center
For the plot or built area
identify center
use midpoint / centroid logic as applicable
This center becomes the reference for directional sector division.
Step 7: Create Direction Rays
From the center point, draw rays.
Versions
8-direction system: every 45°
16-direction system: every 22.5°
32-direction system: every 11.25° for advanced work
Recommended professional standard
Use 16-direction grid for most client work.
Step 8: Create Sector Zones
Convert rays into directional sectors.
For 16 directions, define
North
North-North-East
North-East
East-North-East
East
East-South-East
South-East
South-South-East
South
South-South-West
South-West
West-South-West
West
West-North-West
North-West
North-North-West
Step 9: Overlay Functional Zones
Now map the actual layout onto these sectors.
Mark
main door
master bedroom
children bedroom
kitchen
toilet
puja
living
dining
staircase
office cabin
machine zone
dispatch
cash
storage
This is where Vastu becomes practical.