In order to produce an accurate landscape design, you require an base plan taken from accurate measurements. It is important to follow a routine when doing this.
Step 1 – Map building(s) first
Get the footprint of the house down first as large as possible on a sheet of graphed paper on your clipboard. Start at a corner of the building. Do not worry about drawing to scale; this is a mud map drawing. You are simply recording accurate measurements of wall and windows. These values will later be used when constructing the accurate base map.
Tip: The only reason to use graphed paper is to help you draw straight lines.
The figure below shows a typical map of a building. Distance are best recorded in decimal feet when working in the Imperial system (USA) and in mm when working in a metric environment. Note that the building footprint takes up most of the sheet, but enough room is used to record distance measurements.
Tip: Some designers will put windows length on the inside of the footprint and wall length on the outside.
Don’t forget to locate downpipes attached to the house and their discharge point.
Step 2: Locate side boundaries and house
Next make a second mud map of the building but draw it much smaller (and without dimensions) in the center of a second sheet.
Using your long tape, measure from corners of the house to the boundary corners. We use two known points (on the corners of the house) and measure to the unknown point (the corner of the boundary). This process is known as triangulation and can be applied to the location of any significant trees on the site.
Tip: Make sure that you take enough measurements (triangles). It does not matter if you exceed to number require to properly locate the boundary. You do not want to have to make a return visit to pick up a measurement that you forgot to take!
Some designers make the corners of the house A, B, C and D and make a small table listing lengths A to corner, B to corner etc. Trees might be labelled E, F, G, H, I, J etc. and distances to them incorporated into a table.
Remember to locate significant trees on the site and make sure that services such as water, gas, telecommunication lines are located accurately.
Back at our home base, based on these two drawings and measurements, we we can produce an accurate scaled drawing of the site and the buildings on it.
Tip: If the site has significant fall, is extra large of contains many buildings, it may be worth discussing with your client the need to have a proper survey prepared.
Step 3: Locate direction of north
Use your compass or phone and locate the direction of North. Mark the direction of North in relation to the building with a narrow on the plan. Double check that the arrow you have drawn indeed indicates north correctly as you need to know those areas of the site that will be in shade and sun. This will directly influence your planting plans.
Our next step is to take this site data and turn it into a proper (and accurate) base plan. While this task can be achieved using conventional hand drafting techniques, we are going to use CAD software.
Tip: For successful hand drafting you will need a comprehensive set of tools – drawing table, set square, angular drafting tool, compasses, drafting pens, cleaning equipment, erasers etc. These can cost a surprising amount of money. The CAD software we will use to do the same job and more and yet costs less money!