I am a newbie to earth engine. I got a question. how can I have geometrycollection as list of geometries?
I drew some polygons and they are imported as geometrycollection.
I would be grateful if anyone can help.
if I understand your question, geometries method should solve the problem and there is no need of extra stuff.
I mean suppose your geometrycollection is named geom_col. then :
var geom_col_list = geom_col.geometries()
would give a list of included geometries.
If i get you wrong, explain in more detail please.
Related
I'm quite beginner at R so I'm struggling with what I've found on google for how to plot species occurrence data points in R (I know how in QGIS but my supervisors want R) and then fill in 10km or 1km grid squares where the species has occurred. The photo shows what I mean but has been produced in DMap rosemarybeetlemap
The main issue I have is that my csv file of records only has alphanumeric Ordnance Survey grid references - can R plot with these or do they need to be split into easting/northings or even decimal latitude/longitude? and if so, how?
Any help is greatly appreciated!
Locations detailed in Ordnance Survey’s National Grid (NGR) format in contrast to using eastings and northings (in metres) splits the Great Britain into lettered grid squares and then defines locations within each lettered grid square. You know but some explanation you'll find here as a beginners guide to finding grid references).
For your main issue following article maybe a solution for a first step Converting (British) National Grid references.
I quoted some info below (credits to mikerspencer and Claudia Vitolo).
There’s no need to write a script from scratch to convert grid references, someone has done it already! There is some legwork to do in getting your NGR coordinates in a format ready for the conversion. The script that follows does just that, taking a csv file as your start and end point.
Let me start of by stating that I'm new to programming in Python and working with OSMNX.
I have the building footprints saved in a Geodataframe as:
gdf = ox.geometries_from_polygon(P, tags={'building':True}) # Geo dataframe for buildings
If I open this geodataframe, I see the polygons that are used for the buildings (among many other things). My question is, how can I add another column that will be able to calculate the area for each building from this polygon?
Help is much appreciated :) !
As there is a library dedicated to US zipcodes called as library(choroplethrZip) is there any other library for plotting zipcodes in Amsterdam?
I also tried using hcmaps to plot the neighbourhoods but I was not able to find deep.
mapdata <- get_data_from_map(download_map_data("countries/nl/nl-nh-all"))
I can only go till north holland but not deep into Amsterdam.
Can anyone help me with this?
Thanks in advance.
You can find the whole Highcharts map collection here: https://code.highcharts.com/mapdata/
Probably there is no such deep map displaying zipcodes in Amsterdam, so you should create a custom one which is not easy (especially integrating it in R, I have never seen this before). I hope this answer clarifies you a little.
https://www.highcharts.com/docs/maps/create-custom-maps-for-highmaps
https://www.highcharts.com/docs/maps/custom-geojson-maps
Please pardon me if this is a redundant question. I am new to R. I was going through this post- http://www.r-bloggers.com/mapping-gps-tracks-in-r/. It maps the gps tracks in R using ggmap. My question is that, once we have the final map, is it possible to put grids on it? If yes, how to do it?
EDIT- Ok let me rephrase my question... suppose I have plotted some gps coordinate on a map. Then how to put grid over it? Let me take the example of one of the question already solved here at stack overflow by Cory: Plotting GPS coordinates using ggmap
Here`s the final map:-
Now my question is how to get a grid structure on this map?
TIA!
TIA!
Regards,
Lesnar
I have a SpatialPolygonDataFrame and a SpatialPointDataFrame. I want to extract the values of the polygons to the points. I'm using over()
values_poly = over(points, polygons)
What I get is a data.frame like described but how can I know which row was which point?
Is there a way?
Seems like someone else had more or less the same question.
For my purposes the function worked very well...
Joining point to polygon
Sorry for opening a new topic...
Greetings