polygon

问题 How do I merge polygon features in a shapefile with many polygons? rbind and union just combine the rows of the shapefile features, they don't actually merge the polygons themselves. Desired result in example below: How do I get the below shapefile with duplicated ID_2 to merge to a single polygon in sptemp? Example below of GADM level 2 of Ethiopia has first two rows of the shapefile ID_2 column duplicated (value=1). I'd like sptemp with 79 features combining the first two rows that are the

问题 For example, I have a css class with a polygon clip-path applied to it like so: .services-image-left { -webkit-clip-path: polygon(0 0, 97% 0, 83% 100%, 0% 100%); clip-path: polygon(0 0, 97% 0, 83% 100%, 0% 100%); } But I understand for this to work in Edge and IE I need to use the "clippath" property with svg points. Is there an easy way to convert the above polygon to an svg shape and apply it to everything with the .services-image-left class like the above sample? 回答1: The conversion is

问题 I've got loads of coordinates for a polygon in a database. I also have coordinates for an marker in my database. How do i detect if the marker is inside this polyon. Note: I use a cronjob to move the marker, and in this cronjob it needs to detect this. So javascript isn't involved! Shape of polygon is not just a circle or square. It could be for example a country or sea. 回答1: There is now a function in the Google Map API that does that. Google Map coordinates in polygon containsLocation(point

问题 I've got loads of coordinates for a polygon in a database. I also have coordinates for an marker in my database. How do i detect if the marker is inside this polyon. Note: I use a cronjob to move the marker, and in this cronjob it needs to detect this. So javascript isn't involved! Shape of polygon is not just a circle or square. It could be for example a country or sea. 回答1: There is now a function in the Google Map API that does that. Google Map coordinates in polygon containsLocation(point

问题 I am trying to manipulate some Brazilian Census data in R using the new "sf" package. I am able to import the data, but I get an error when I try to create the centroids of the original polygons library(sf) #Donwload data filepath <- 'ftp://geoftp.ibge.gov.br/organizacao_do_territorio/malhas_territoriais/malhas_de_setores_censitarios__divisoes_intramunicipais/censo_2010/setores_censitarios_shp/ac/ac_setores_censitarios.zip' download.file(filepath,'ac_setores_censitarios.zip') unzip('ac

问题 I have a polygon dataframe: With vertice coordinates: 43740.95 40726.46 43741.36 40720.19 43742.67 40729.28 43743.99 40716.16 43745.52 40730.97 43748.72 40714.19 43748.72 40731.14 43748.72 40714.19 43752.23 40714.76 43752.86 40729.43 43755.27 40716.68 43756.77 40723.24 43757.19 40719.73 Is there any way in R to interpolate spatial objects such that the boundary could be more smooth? 回答1: You can use the smoothr package for smoothing an sf object. I created an example based on your data where

问题 I am trying to check if the lat,lon is in the polygon or not. Here is my array : $vertices_x : Array ( [0] => -32.581189 [1] => -38.785885 [2] => -39.26384 [3] => -34.919383 [4] => -32.284464 ) $vertices_y: Array ( [0] => 170.643905 [1] => 170.424179 [2] => -178.15004 [3] => -176.524063 [4] => -178.325821 ) $longitude_x : 173.5385 $latitude_y : -34.472 $points_polygon = count($vertices_x) - 1; I am using below function to check : function is_in_polygon($points_polygon, $vertices_x, $vertices

问题 Hope all are doing well. In an on going project, am using Google Maps and need to draw an overlay like the below attached image, where the overlay covers the radius of 50km region from my current location. Appreciate your help, I've tried few links which show same like Inverted Polygon in GMSMapView 来源： https://stackoverflow.com/questions/61609873/objective-c-google-maps-draw-a-polygon-within-radius-of-50-kilometers-from-my-c

问题 In my app, i have recyclerview which contain imagview and this imageview contain static map image by using coordinates which i store in sqlite. and when i click on that image i am passing that coordinates in string array format to other map activity and then using this string array coordinates again draw the same polygon which static map hold into google map. but i don't understand how to do this. I tried following code but not working: this is code of my adapter class where i display static

问题 I have a list of Shapely polygons in Python. To find out which polygon touch is easy, using the .touches() method. However, I need something that returns True only when the polygons share more than one point (in other words shares a border). Let me illustrate: In [1]: from shapely.geometry import Polygon In [2]: polygons = [Polygon([(0,0),(0,1),(1,1),(1,0)]), Polygon([(1,0),(1,1),(2,1),(2,0)]), Polygon([(2,1),(2,2),(3,2),(3,1)])] In [3]: polygons[0].touches(polygons[1]) Out[3]: True In [4]: