Download presentation
Presentation is loading. Please wait.
Published byChristian Rodgers Modified over 8 years ago
1
The Site Landscaping Chapter 4
2
Objectives* Define the word site and explain its significance in the development of a landscape List the typical features that must be evaluated on most sites Describe sources of site information Explain the geographic information systems Define the following terms: setback, zoning regulations, property lines, right of ways, easement, zero lot line Describe the limitations that the terrain imposes upon human activities Understand the basic concepts of land grading Describe how to prepare a base map
3
Site A piece of land that has the potential for development No two sites are identical Each has its own personality that must be identified Determines what the landscape designer can and can’t do
4
Site Features and Characteristics Natural Features Man Made Features Cultural Features Physical Cultural Visual See p. 61-62
5
Sources of Site Information Topographical Maps- US Geological Survey Soil Survey’s- Natural Resource Conservation Service Weather Data- Local Weather Records Property Lines- County Clerks Office Other cultural characteristics of the site
6
Geographic Information Systems Computerized systems that combine both hardware and software to provide mapping data about geographic regions of the country Different than aerial photography because it provides more information about the site Not commonly used in residential design
7
Reading the Terrain Topography-the rise and fall of the land Topographic maps will represent vertical changes in the terrain as broken lines called contour lines The lines represent a vertical rise or fall over the horizontal distance measured from the maps scale Each contour line connects all the points of equal elevation on the map and each is labeled to indicate its elevation The vertical distance between contour lines-the contour interval is always stated on the map Steep slopes are identified by closely spaced contour lines, gradual slopes by more widely spaced lines
8
Things to Know Regarding Contours and Contour Lines Existing contours are always shown as broken lines Proposed contours are always shown as solid lines Contours are labeled either on the high side of the contour or in the middle of the line Spot elevations are used to mark important points Contour lines neither split nor overlap, except in overhangs Contour lines always close on themselves. The site map may not be large enough to show the closing but it does always occur on the land Runoff water always flows downhill along a route that is perpendicular to the contour lines
9
Slopes Measurements that compare the horizontal length (measured from the map’s scale) to vertical rise or fall (as determined by the contour lines and contour interval) Rise over Run Expressed as Ratios or Gradients and Percents
10
Ratios and Gradients The horizontal space required for each foot of vertical change in elevation is compared as V:H=R V is the vertical distance H is the horizontal distance R is the ratio or gradient Commonly expressed as 1:3, 1:4 and so forth Fig 4-4 p.67
11
Percent Vertical distance is divided by the horizontal distance and the answer is expressed as a percentage Fig 4-5 p. 67
12
The Need for Terrain Information Answers these basic questions Where the does the surface water flow? Will water collect in puddles anywhere? What types of human activities can take place? Will grass grow on that slope? Can a car be parked safely on that slope? Land that has a 5-10% slope is usually acceptable for human activity Fig 4-6 p. 68
13
Preparing a Base Map Base Map: a graphic depiction of the site features that were collected, measured, and inventoried Enables the designer to look at the big picture Plan view drawing that locates existing buildings, their windows, doors and other significant features, existing hardscape, all existing plants and other physical items noted during the site inventory Can also plot out the location of setbacks, easements, underground utility lines and overhead wires Prevailing wind directions, surface water patterns and attractive or offensive off-site features that impact the site may also be noted here Must be done first so the rest of the design process can take place Usually followed with a drawing developed as an overlay that eliminates all existing features that will not be included in the new landscape
14
Assignment Complete Achievement Review A, B, C, D, p. 71-72
Similar presentations
© 2024 SlidePlayer.com. Inc.
All rights reserved.