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Category Archives: General

Just general information.

How to compress powerpoint presentations

These instructions are applicable to Powerpoint 2011 on MacOS and Powerpoint 2013 on PC (and probably versions on either side of these).

The size of your Powerpoint presentation is mostly going to be based to the number of images you have in your presentation, image size (especially if you are using MacOS), and your default compression settings (only applicable if you are using a windows PC).

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PDFSaM: free software for splitting and merging pdfs

PDFSaM is free software for splitting and merging pdfs. This is a viable alternative to paid software like Acrobat Pro. Continue reading

Turning a DOI into a URL (link)

What is a DOI?

The Digital Object Identifier (DOI®) System is for identifying content objects in the digital environment. DOI® names are assigned to any entity for use on digital networks. They are used to provide current information, including where they (or information about them) can be found on the Internet. Information about a digital object may change over time, including where to find it, but its DOI name will not change.


How to do it

Let us examine an example: doi: 10.1130/G32273.1  the “doi:” part identifies that what follows is a DOI but it is not part of the DOI itself. In this case the DOI is: 10.1130/G32273.1

To resolve the DOI as a URL(link) we need to precede it by so that in the example above the URL(link) becomes

For better formatting you can change the text that appears for the link e.g. doi: 10.1130/G32273.1

Why turn a DOI into a URL (link)?

If you are creating or sending any kind of document electronically (e.g. webpage, pdf, word doc, email) then this is useful for the reader, who can simply click on the link and be taken straight to the page. Most software (e.g. ms word, email clients) automatically make URLs clickable.

If you want to resolve any DOI you can of course go to the site: and paste the DOI in.




This is my first post. This blog will be used for disseminating information primarily for geology department staff and students. Find out more about this blog. I hope to have posts with illustration and GIS tips and tricks and announce upgrades and changes to equipment and software etc. around the department.