projection

问题 I have this LINQ query: List<Customers> customers = customerManager.GetCustomers(); return customers.Select(i => new Customer { FullName = i.FullName, Birthday = i.Birthday, Score = i.Score, // Here, I've got more fields to fill IsVip = DetermineVip(i.Score) }).ToList(); In other words, I only want one or two fields of the list of the customers to be modified based on a condition, in my business method. I've got two ways to do this, Using for...each loop, to loop over customers and modify

问题 I am making a java program that classifies a set of lat/lng coordinates to a specific rectangle of a custom size, so in effect, map the surface of the earth into a custom grid and be able to identify what rectangle/ polygon a point lies in. The way to do this I am looking into is by using a map projection (possibly Mercator). For example, assuming I want to classify a long/lat into 'squares' of 100m x 100m, 44.727549, 10.419704 and 44.727572, 10.420460 would classify to area X and 44.732496,

问题 I'm trying to find the visible size of a sphere in pixels, after projection to screen space. The sphere is centered at the origin with the camera looking right at it. Thus the projected sphere should be a perfect circle in two dimensions. I am aware of this 1 existing question. However, the formula given there doesn't seem to produce the result I want. It is too small by a few percent. I assume this is because it is not correctly taking perspective into account. After projecting to screen

问题 I'm trying to find the visible size of a sphere in pixels, after projection to screen space. The sphere is centered at the origin with the camera looking right at it. Thus the projected sphere should be a perfect circle in two dimensions. I am aware of this 1 existing question. However, the formula given there doesn't seem to produce the result I want. It is too small by a few percent. I assume this is because it is not correctly taking perspective into account. After projecting to screen

问题 I've a .json file that look like : [ { "network": "X.X.X.1", "defaultGateway": "X.X.X.X", "ipAddressTab": [ { "foo1": "10.0.0.1", "foo2": "network", "foo3": "reserved", "foo4": null, "foo5": null, "foo6": null, "foo7": null, "foo8": null, "foo9": null, "foo10": null, "foo11": null }, { "foo1": "10.0.0.2", "foo2": "network", "foo3": "reserved", "foo4": null, "foo5": null, "foo6": null, "foo7": null, "foo8": null, "foo9": null, "foo10": null, "foo11": null }, { "foo1": "10.0.0.3", "foo2":

问题 I need to convert coordinates X, Y into Latitude and Longitude. I've read wikipedia map projections, similar stackoverflow forums, applied my custom solutions and still didn't work. The coordinates I get from my formula are wrong, Longitude is acceptable but Latitude is not. I don't see where my calculous is wrong. The X,Y Point is taken from a JLayeredPane with the size of a background Map image, once a smaller image is released on this Map image, the point is taken. public void

问题 So, I have been using Basemap for years in Python 2.7, I am moving to Python3.7 and would like to move to cartopy. I work with a lot of data where I have the projection info but I don't have lat and lon grids of the data. This is how I would handle things in Basemap. m=Basemap( llcrnrlon=-118.300, llcrnrlat=20.600, urcrnrlon=-58.958, urcrnrlat=51.02, projection='lcc', lat_1=38., lat_2=38., lon_0=-95., resolution ='l', area_thresh=1000. ) mwidth = 1008 #for 163 5km AWIPS2 grid mheight = 722

问题 Given n images and a projection matrix for each image, how can i calculate the ray (line) emitted by each pixel of the images, which is intersecting one of the three planes of the real-world coordinate system? The object captured by the camera is at the same position, just the camera's position is different for each image. That's why there is a separate projection matrix for each image. As far as my research suggests, this is the inverse of the 3D to 2D projection. Since information is lost

问题 Given n images and a projection matrix for each image, how can i calculate the ray (line) emitted by each pixel of the images, which is intersecting one of the three planes of the real-world coordinate system? The object captured by the camera is at the same position, just the camera's position is different for each image. That's why there is a separate projection matrix for each image. As far as my research suggests, this is the inverse of the 3D to 2D projection. Since information is lost

问题 I have a projection for my entity and I need to sort it by field of inner class. This is part of my entities: class Person { UUID guid; Set<DisabilityHistory> disabilityHistory; } class DisabilityHistory { Date createdDate; } I know about sort param but request like api/person/search?projection=myProjection&sort=disabilityHistory.createdDate,asc doesn't work. The only solution I have found is using @OrderBy annotation in my entity but in this case it will sorted always and I worried about