terra | WebGL grass on a terrain | Graphics library
kandi X-RAY | terra Summary
kandi X-RAY | terra Summary
2017-2020 by Mike Linkovich • spacejack.github.io. This is a followup to a previous experiment to render grass as geometry with a vertex shader. This demo adds terrain elevation, improved lighting, grass animation, wind, water and other details. Additionally, this project has been updated since its initial release. It now features terrain texturing, transitions between terrain types, more grass lighting improvements, better wind animation, a few minor fixes and a better out-of-the-box build with browserify and TypeScript 2.1. And finally this readme has been re-written to provide a more detailed description of the implementation.
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Community Discussions
Trending Discussions on terra
QUESTION
I've created a vba script in combination with selenium to scrape price $8.97
from this webpage. The script does fetch the content if I run it in non-headless mode. However, my intention is to grab the content in headless mode. I know I can use their api to fetch the price but the very api gets blocked after 4/5 requests, so I intentionally chose this route.
I've tried with (works in non-headless mode):
...ANSWER
Answered 2021-Jun-01 at 17:54You need to wait also properly to get the text, even though your css looks good.
Or you could set a timeout on the page loading :
QUESTION
I need to project longitude/latitude coordinates in the terra package, but I don't believe it is working correctly, as I am trying to extract data from a raster with this projection, but the data is not being extracted correctly.
Here's my lon/lat points and the code I am using to try to project them.
...ANSWER
Answered 2021-Jun-13 at 18:23Why do you think it has to do with the projection? Either way, it appears to work for me.
QUESTION
I am using terraform to build infra in GCP. I am trying to assign roles to a service account
using terraform but unable to do so. Below is my code:
sa.tf:
...ANSWER
Answered 2021-Jun-09 at 20:17The service account providing authorization to Terraform is missing the permission resourcemanager.projects.getIamPolicy
which is the source of the error message.
The service account is also missing the permission resourcemanager.projects.setIamPolicy
which is required to change IAM policies.
Those permissions are part of the role roles/resourcemanager.projectIamAdmin
(Project IAM Admin).
To list the roles assigned to the service account:
QUESTION
I'm trying to scrape product title
, description
and price
of a product from a webpage using requests module. Although the content of that page is dynamic, most of the product information are available within page source in some script tag.
I have already grabbed product title
and description
from that page, which are within container variable. Unfortunately, I can't find the price within the container. So, I wish to scrape Regular price: $8.97
and Sale price: $5.97
from that site using requests module.
ANSWER
Answered 2021-May-30 at 05:12you have 242 reputation so i can't
anyhow https://www.walmart.ca/api/product-page/v2/price-offer send post request to this link you will obtain your things
or
simply use selenium
QUESTION
I have 29 raster tiles with the following properties:
...ANSWER
Answered 2021-May-27 at 19:34What version of terra
are you using? I ask because I believe that the current version will give a warning but proceed. Also, you could of course aggregate with 100 instead of 113 so that the origins are not changed.
They easiest approach may be to make a virtual raster like this:
v <- vrt(files, "my.vrt")
and then proceed with
r <- rast("my.vrt")
and perhaps
a <- aggregate(r, 100)
Or whatever it is you would like to do.
QUESTION
my issue is that the blur applies to the entire square of the div not the triangle.
If this can be done via svg instead, I'm interested.
...ANSWER
Answered 2021-May-20 at 16:44Use clip-path
instead.
QUESTION
Problem: Plot is empty, no results when clipping raster with shapefile.
I am using a shapefile with original EPSG4326 projection and a MODIS product with original sinusoidal projection. I converted both to the same projection (DesiredCRS) as you can see in the script, however when making a clip of the raster I don't get any results.
...ANSWER
Answered 2021-May-13 at 19:36This is but tricky to debug because you mix different packages, and you do not show(object)
. Anyway, here is a terra approach, showing where it would be useful to see the objects metadata; and a plot that shows the raster and vector data together.
QUESTION
I have raster files that have the same resolution and extent but differ in the number of NA. I want to unify the number of NA between all of them. Is it possible to do it by considering a cell as non-NA if it's not NA in all the raster files?
Here an example :
...ANSWER
Answered 2021-May-18 at 23:40It can be a bit confusing to use raster and terra together, so I will just use terra
(but you can do the same with raster
, using stack
in stead of c
and cellStats
in stead of global
.
Your example data
QUESTION
I use terra package to extract pesticide application from raster files. In the extract step it seems that terra removes some rows. In this example there are 19 warnings where it says:
Failed to compute min/max, no valid pixels found in sampling. (GDAL error 1)
After the extract step I have fewer rows left and it seem to have dropped some rows.
This step worked fine using raster (from here Using raster to calculate the mean application and total application of pesticides, but numbers not adding up) but it is unfortunately to slow given the amount of files I need to process.
Any ideas what this error means and how to solve it?
Here is the code:
...ANSWER
Answered 2021-May-09 at 02:45This happens because some of the polygons are so small that they do not cover a raster cell. This has now been fixed in the development version (terra >= 1.2.8); but here is an alternative approach with the exactrextractr
package --- this is fast and gets you a very precise estimate, which is especially relevant when your raster cells are relatively large as in this case (although wrld_simpl
is rather imprecise).
QUESTION
I'm working with raster
package and I try to switch to terra
but for some reasons that I don't understand, terra
cannot reproduce the same operation of raster
when working in parallel with packages such snowfall
and future.apply
. Here is a reproducible example.
ANSWER
Answered 2021-May-08 at 22:11A SpatRaster
cannot be serialized, you cannot send it to parallel compute nodes. Have a look here for more discussion.
Instead you can (a) send and receive filenames; (b) parallelize your custom function that you supply to app
or lapp
; (c) use the cores=n
argument (where available, e.g. app
and predict
); (d) use a mechanism like wrap
; (e) send a filename and a vector to make a SpatExtent to process and create a virtual raster from the output tiles (see ?vrt).
For example, you could do use a function like this (Option "a")
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