This may be a rough sketch or any official base plan of a property.
Sketch Plan
A sketch plan of a property based on the relocation survey.
Relocation Plan
From subdivision survey or splitting a tract of land into smaller parcels
Subdivision Plan
Re-mapping of two or more adjacent lots or parcels of land, combining them into one larger parcel.
Consolidation Plan
- Angles between adjacent
lines in a closed polygon. - They may be measured
clockwise or counterclockwise. - Re-entrant angles are
interior angles greater than
180 degrees. - The sum of the interior angle
of any polygon is equal to
(n - 2)(180 degrees), where
n is the number of sides.
Interior Angles
- Angles located outside a
closed polygon.
Exterior Angles
- The angles between a line and the prolongation of the preceding
line. - May be turned to the right (clockwise) or turned to the left
(counterclockwise) and appended with letters R or L. - Right deflections have the opposite signs of left deflections
- Positive signs normally defines angle with deflection to the right.
- May have values 0 to 180 degrees but often not used to angles
greater than 90 degrees. - In a close polygon, the algebraic sum of the deflection angle should
always equal 360 degrees.
Deflection Angles
- These are angles measured clockwise from the preceding line to the
succeeding line. - This is also called Azimuths.
Angles to the Right
- Acute horizontal angles between the reference meridian and the line.
- Contains angles that are between 0 to 90 degrees.
- It always starts on either N or S and will turn E or W.
- Bearings can be measured in reference to True or Magnetic meridian.
Bearings
- The angle between the meridian and the line measured clockwise.
- Contains angles that are between 0 to 360 degrees.
- Reference meridian can be the N or S.
- Azimuths can be true, magnetic, grid or assumed.
Azimuth
An imaginary line between the North Pole and the South Pole, drawn on maps to help to show the position of the place.
Meridian
- Also called astronomic or geographic meridian.
- This line passes through the
geographic north and south of
the earth and the observer’s
position. - The generally adapted
reference line in surveying. - The direction of true meridian is
invariable and unchanged
regardless of time. - True meridian is used for
markings of land boundaries.
True Meridian
- A line of reference parallel to the
magnetic lines of force. - Magnetic meridian is not parallel
to the True meridian. - This utilizes the magnetic needle
of a compass to locate the
magnetic north. - Used in rough surveys since the
magnetic meridian changes
constantly along with the
location of the magnetic poles.
Meridian Magnetic
- A fixed line of reference parallel to the central meridian of a system plane rectangular coordinates.
Grid Meridian
- This is an arbitrary chosen reference point
taken for convenience. - This utilizes a well defined and permanent
reference point. - Applicable plane surveys of limited extent
Assumed Meridian
*are control points of permanent location where other surveys are referenced from.
Bureau of Lands Location
Monument (BLLM)
is an intrinsic constraint on a site’s development potential.
Parcel size
off-site factors are more likely to influence the site’s design.
Smaller sites
- allow greater flexibility in arranging program elements on the site.
- allows for the integration of green space, including natural areas and new plantings to separate incompatible uses, screen undesirable views off site, and filter and retain storm water.
Larger sites
can reduce development potential and design flexibility.
Shape
Understanding the site’s topography is essential in making
good site planning and design decisions (Largo, 2013).
Topographic Map
*data are portrayed on topographic
maps as contour lines and spot elevations.
*For site planning purpose, an effective way to
visualize topographic relief is to create a
choropleth map of elevation.
Elevation
A contour line is the graphic representation of a contour on a plan or
map indicating locations with equal elevation.
*A gradual rather than an abrupt
change is assumed to occur
between adjacent contours.
*This smoothing effect that gives the
cone and the pyramid their true form.
*The ability to dissect landforms into
their various components shapes and
to understand the relationship of the
shapes to each other will make the
task of analyzing, interpreting, and
visualizing the landscape easier.
Contours and Form
*Spatial variation in a site’s elevation creates slopes that have both a gradient and an orientation.
*In site planning, moderate (8 to 15%) to steep slope (15 to 25%) would require soil protection or stabilization while flat terrain (<1%) would be challenging in terms of drainage.
Slope
