area

calculate overlapping areas

I am following the example here and successfully created convex hulls. But I have a question on how to calculate the shared areas between each convex hull in the following figure: Thanks!

2021-09-24 07:56:12    分类:问答    area   geopandas   convex-hull

使用 opencv 计算由 matplotlib 创建的轮廓的轮廓面积(Calculate contour area with opencv for contours created by matplotlib)

2021-09-14 07:50:08    分类:技术分享    python   opencv   matplotlib   contour   area

在另一个国家内绘制许多国家(Plot many countries inside another)

2021-09-13 18:11:39    分类:技术分享    r   map   projection   area

检查选定区域中的坐标(Check if coordinate in selected area)

2021-09-11 19:31:04    分类:技术分享    geometry   coordinates   area

单击此图像的地图区域时获取 img 标签 ID(Get img tag id when click on map area of this image)

2021-09-11 15:54:00    分类:技术分享    javascript   html   image   shape   area

如何为两条曲线下方的区域着色？(How do i color the Area below the two curves?)

2021-09-11 07:47:04    分类:技术分享    matplotlib   area   curve

如何为两条曲线下方的区域着色？(How do i color the Area below the two curves?)

2021-09-11 07:45:10    分类:技术分享    matplotlib   area   curve

Plot many countries inside another

I want to show how big Brazilian Amazon Forest is, plotting different countries inside it. Like in this image: To accomplish that, I loaded some shapefiles and changed their projection to one that would keep the areas proportional, like Cylindrical Equal Area: library(rgdal) countries <- readOGR("shp","TM_WORLD_BORDERS-0.3") countries <- spTransform(countries,CRS("+proj=cea")) amzLegal <- readOGR("shp","amazlegal") amzLegal@proj4string <- CRS("+proj=longlat") amzLegal <- spTransform(amzLegal,CRS("+proj=cea")) plot(amzLegal) FR <- countries[which(countries\$NAME == "France"),] for (i in 1:length

2021-09-09 04:29:12    分类:问答    r   map   projection   area

Get img tag id when click on map area of this image

I have some images-figures with map-area like this and i need get image id when click inside area zone can i made it without custom area functional realisation with js? UPD sandbox UPD2 found second, other problem. first area zone (red), which covered by second image not clickable and z-index for area not working. FINAL UPD I wrote small custom function for mapping some objects. Maybe it will help someone: jsFiddle

2021-09-07 15:25:04    分类:问答    javascript   html   image   shape   area

Can I have an onclick event on a imagemap area element?

I would like to put an onclick event on an area element. Here is my setup: <img id="image" src="wheel.png" width="2795" height="2795" usemap="#Map" > <map name="Map"> <area class="blue" onclick="myFunction()" shape="poly" coords="2318,480,1510,1284" href="#"> </map> I have tried 2 different ways to have an onclick event. Firstly i tried this: \$(".blue").click( function(event){ alert('test'); }); I have also tried this: function myFunction() { alert('test'); } Neither of the above work. Do area elements support the above, or do they only support having a href?

2021-09-06 11:36:46    分类:问答    javascript   jquery   onclick   area   imagemap