![mapinfo 10 intersection between circle mapinfo 10 intersection between circle](https://i.ytimg.com/vi/4ceqAO09VGI/maxresdefault.jpg)
For this projection, the maximum scale distortion for the 48 states is 1.25 percent. Used for the conterminous United States, normally using 29☃0' and 45☃0' as the two standard parallels. Used for small regions or countries but not for continents. Total range in latitude from north to south should not exceed 30–35°. Limitationsīest results for regions predominantly east–west in orientation and located in the middle latitudes.
![mapinfo 10 intersection between circle mapinfo 10 intersection between circle](https://www.ajtmh.org/view/journals/tpmd/71/2_suppl/full-214f5_1o.jpg)
Along meridians, scale follows an opposite pattern. Along parallels, scale is reduced between the standard parallels and increased beyond them. Distanceĭistances are most accurate in the middle latitudes. Locally true along the standard parallels. AreaĪll areas are proportional to the same areas on the earth. The 90° angles between meridians and parallels are preserved, but because the scale along the lines of longitude does not match the scale along the lines of latitude, the final projection is not conformal. Shape along the standard parallels is accurate and minimally distorted in the region between the standard parallels and those regions just beyond. Two lines, the standard parallels, defined by degrees latitude. Parallels are unequally spaced concentric circles whose spacing decreases toward the poles. Poles are represented as arcs rather than as single points. The meridians are equally spaced straight lines converging to a common point. This projection is best suited for land masses extending in an east-to-west orientation rather than those lying north to south. Although neither shape nor linear scale is truly correct, the distortion of these properties is minimized in the region between the standard parallels. Enabling this creates a separate region for each source object.This conic projection uses two standard parallels to reduce some of the distortion of a projection with one standard parallel. The default is to combine the buffers into one region. Sites rated High Sensitivity could be updated with a buffer distance of 1,000m, sites rated Medium Sensitivity could be updated with a buffer distance of 500m.
![mapinfo 10 intersection between circle mapinfo 10 intersection between circle](https://m.media-amazon.com/images/I/610QI8dkz7L._AC_SL1500_.jpg)
![mapinfo 10 intersection between circle mapinfo 10 intersection between circle](https://gmd.copernicus.org/articles/14/5063/2021/gmd-14-5063-2021-f01-web.png)
Buffer Distance Field – alternatively QGIS can use a value from a numeric field, this makes drawing variable width buffers for features in the same layer easy e.g.Buffer Distance – the distance the buffer will extend from the source objects.Input vector Layer – the layer that contains the source objects.These can be downloaded from OS Open Data.:. In this case I’m going to apply a 100m buffer around overhead electricity lines. I have used buffers to count address points within set distances of new roads, assign address points to local amenity catchment zones etc. It is similar to MapInfo’s Erase function.ĭissolve breaks apart overlapping regions in the same layer.īuffer creates a region around each feature in the source layer. It is similar to MapInfo’s Erase Outside function.ĭifference creates a new feature based on the area of the input layer that isn’t overlapped by the clipping layer. It is similar to the intersection but differs in that the attributes of the chosen layer only are copied to the new feature. Symmetrical Difference creates new shapes based on the non overlapping areas of the original features:-Ĭlip creates a new shape based on the area of the input layer that is overlapped by the clipping layer. Union creates a new layer that covers the combined features
#MAPINFO 10 INTERSECTION BETWEEN CIRCLE UPDATE#
To calculate the area of overlap, update the newly created feature’s attribute table with its area. The attributes from both source layers are copied to the new feature:. Intersect creates a new feature based on the area of overlap (the intersection) between the two layers.