SLOPE BAND ANALYSIS - CITY OF LOS ANGELES (Land Surveying)
In March of 2011 the city adopted a new ordinance for hillside designated areas. The ordinance reference is Baseline Hillside Ordinance No. 181624.
The ordinance is a whole new ball game regarding any type of improvement within the specific hillside areas.
The ordinance has created new work for Land Surveyors. According to the ordinance, a Slope Band Analysis Map has to be prepared by either a registered civil engineer of a licensed land surveyor. Since the Slope Band Analysis Map deals directly with the location of property lines, it appears that this map will be generated mainly by licensed surveyors.
I just did my first map and thought I would post the example of it as well as how I was able to do it easily using Cadd.
I made a component, or a block, as it is termed in Autocad, of a series of circles with the different slope areas named. The parameters that the ordinance details, for instance, have ranges like 0% to 14.99%. I just ignored that 14.99% and made the set of circles at 15, 30, 45, 60 and 100%. Common sense needs to be injected into this new map.
The component was made for one foot contours.
Since blocks and components create a phantom drag image before placement, one can find the changes of slope ratios easily.
The above image shows the drag image centered on a contour at a slope change area where the 0% to 15% rate switches to a 15% to 30% rate. You can see where contour line 481 intersects the circle of 15%-30% rate.