geospatial

问题 I'm trying to plot a static base map underneath my sf object (for print). When using ggmap I first get a lot of errors, then I can't seem to figure out how to chain the base map to my ggplot2 object with a geom_sf . library(sf) # devtools::install_github("tidyverse/ggplot2") library(ggplot2) library(ggmap) nc <- st_read(system.file("shape/nc.shp", package="sf")) nc_map <- get_map(location = "North Carolina, NC", zoom = 7) ggmap(nc_map) nc_centers <- st_centroid(nc) nc_centers %>% ggplot() +

问题 Let's say I have a small area mapped out using local planar coordinates in meters. e.g. A rectangular warehouse that's 300m x 450m. I use some GPS device to find the WGS 84 lat/lon of one corner of the warehouse. How can I project my plane coordinates onto the WGS 84 geoid to find the lat/lon values for the 3 other corners of the warehouse? I understand this is a complicated problem since values vary on different parts of the earth. Do I need to deal with finding some local coordinate system

问题 Let's say I have a small area mapped out using local planar coordinates in meters. e.g. A rectangular warehouse that's 300m x 450m. I use some GPS device to find the WGS 84 lat/lon of one corner of the warehouse. How can I project my plane coordinates onto the WGS 84 geoid to find the lat/lon values for the 3 other corners of the warehouse? I understand this is a complicated problem since values vary on different parts of the earth. Do I need to deal with finding some local coordinate system

问题 I've been researching this for a while now but haven't come across any solution that fit my needs or that I can transform sufficiently to work in my case: I have a large car sharing data set for multiple cities in which I have the charging demand per location (e.g. row = carID, 55.63405, 12.58818, charging demand). I now would like to split the area over the city (example above is Copenhagen) up into a hexagonal grid and tag every parking location with an ID (e.g. row = carID, 55.63405, 12

问题 I've been researching this for a while now but haven't come across any solution that fit my needs or that I can transform sufficiently to work in my case: I have a large car sharing data set for multiple cities in which I have the charging demand per location (e.g. row = carID, 55.63405, 12.58818, charging demand). I now would like to split the area over the city (example above is Copenhagen) up into a hexagonal grid and tag every parking location with an ID (e.g. row = carID, 55.63405, 12

问题 I've been researching this for a while now but haven't come across any solution that fit my needs or that I can transform sufficiently to work in my case: I have a large car sharing data set for multiple cities in which I have the charging demand per location (e.g. row = carID, 55.63405, 12.58818, charging demand). I now would like to split the area over the city (example above is Copenhagen) up into a hexagonal grid and tag every parking location with an ID (e.g. row = carID, 55.63405, 12

问题 I've been researching this for a while now but haven't come across any solution that fit my needs or that I can transform sufficiently to work in my case: I have a large car sharing data set for multiple cities in which I have the charging demand per location (e.g. row = carID, 55.63405, 12.58818, charging demand). I now would like to split the area over the city (example above is Copenhagen) up into a hexagonal grid and tag every parking location with an ID (e.g. row = carID, 55.63405, 12

问题 A user has multiple workflow work orders assigned to them in the Start Center: I want the user to be able to click a button (or link) in the Start Center that will: Open a Maximo map (Maximo Spatial). Show the assigned work orders on the map. Allow the user to click a work order on the map, which will open the work order in the Work Order Tracking application. How can I configure Maximo to do this? Maximo 7.6.1.1 来源： https://stackoverflow.com/questions/57937719/maximo-show-users-assigned

问题 A user has multiple workflow work orders assigned to them in the Start Center: I want the user to be able to click a button (or link) in the Start Center that will: Open a Maximo map (Maximo Spatial). Show the assigned work orders on the map. Allow the user to click a work order on the map, which will open the work order in the Work Order Tracking application. How can I configure Maximo to do this? Maximo 7.6.1.1 来源： https://stackoverflow.com/questions/57937719/maximo-show-users-assigned

问题 I know that room is an abstraction layer over SQLite, I just want to know if I can use it for a different type of Database. I want to use Room to a special version of SQLite with geospatial support, is it possible? I really can't find an answer about this one. Android Spatialite Thanks in advance! 回答1: Yes, if you are willing to write the bridge code for it. One of the methods that you can call on a RoomDatabase.Builder is openHelperFactory(). This takes an instance of SupportSQLiteOpenHelper