I’m trying to create contours from a raster layer in QGIS. On my first attempt, I cropped my raster layer in Photoshop and reimported it, but it lost coordinate data I think. I made the contours successfully and they were beautiful, but mirrored upwards from the raster layer.

The scale is way out. I discovered this when I imported some vector data. A distance that should be 0.04 degrees is now 30 degrees. This probably is why I’m having my next problem:

I eventually figured out a method for cropping the raster layer in QGIS so it’s at the right scale and location. However, when I make contours from this raster they appear square and pixellated, like they follow the pixel boundaries of the raster layer.

The pixel data for the two raters I used looks the same, so why is this one at the smaller scale now looking so different? Any idea how I can get the nice smooth contours that I got on my first attempt (albeit at the wrong scale)?

I’m very new to this, so I may be missing obvious things! I’d appreciate any help.


Question: Change top's sorting back to CPU
Answer: I know it's not a direct answer to your question, but there's a wonderful tool called htop which I'd like to recommend.
It's like an advanced version of the original top tool which allows you to sort the output in a much easier way and appearance.
For example, if you want to sort by CPU, you simply hit F6 and choose your sorting.

Here's how htop looks like:
http://lel.xyz/htop.jpg

Here's how it looks when you press F6:
http://lel.xyz/htopsort.jpg

In order to install it on CentOS/RHEL machines you will have to add the EPEL repo and then simply run:

yum install -y htop

or on Debian machines simply run:

sudo apt-get install htop without adding any repo's.