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In forestry, cartography, and geography, the dot planimeter has been applied to maps to estimate the area of parcels of land. [1] [4] [5] [6] In botany and horticulture, it has been applied directly to sampled leaves to estimate the average leaf area. [7] [8] [9] In medicine, it has been applied to Lashley diagrams as an estimate of the size of ...
To measure planimetrics a planimeter or dot planimeter is used. This rather advanced analog technology is being taken over by simple image measurement software tools like, ImageJ, Adobe Acrobat, Google Earth Pro, Gimp, Photoshop and KLONK Image Measurement which can help do this kind of work from digitalized images.
The images show the principles of a linear and a polar planimeter. The pointer M at one end of the planimeter follows the contour C of the surface S to be measured. For the linear planimeter the movement of the "elbow" E is restricted to the y-axis. For the polar planimeter the "elbow" is connected to an arm with its other endpoint O at a fixed ...
Also called Indianite. A mineral from the lime-rich end of the plagioclase group of minerals. Anorthites are usually silicates of calcium and aluminium occurring in some basic igneous rocks, typically those produced by the contact metamorphism of impure calcareous sediments. anticline An arched fold in which the layers usually dip away from the fold axis. Contrast syncline. aphanic Having the ...
This glossary of geography terms is a list of definitions of terms and concepts used in geography and related fields, including Earth science, oceanography, cartography, and human geography, as well as those describing spatial dimension, topographical features, natural resources, and the collection, analysis, and visualization of geographic ...
Multivariate thematic maps found a resurgence starting in the middle of the 20th Century, coinciding with the scientific turn in geography. George F. Jenks introduced the bivariate dot density map in 1953. [6] The first modern bivariate choropleth maps were published by the U.S. Census Bureau in the 1970s. [7]
Dot planimeter, a device for estimating the area of a shape by counting the lattice points that it contains; Pick's theorem, a more precise relationship between area and lattice points covered by a polygon with lattice-point vertices
Source: Dolph 1977: "the dot planimeter yielded the best estimate of the population mean leaf area for the majority of species" Reviewed: 2008 Beijing Wushu Tournament; Created by David Eppstein . Self-nominated at 21:44, 22 April 2021 (UTC). The article is new enough and long enough. It is neutral and cites many reliable sources.