South Africa 34% open

In my experience, the electoral commission is one of the few South Africa entities that make such datasets so easily available for public use (and providing information that is machine readable). The standard licence is restrictive, only allowing for personal use.

Government budgets are standardised across government departments allowing for easy comparisons. Historic budgets are also available in various forms back to 1993. 2013 onwards seem the most comprehensive. Planned expenditure data is available in PDF and XLS. The data is copyright under the National Treasury.

Some of it is available only in PDF files, but some datasets are available in Excel and ASCII formats under the 'interactive data' heading.

The South African Weather Service does offer a machine-readable api, but only to paying customers, despite being a public entity under the Ministry of Water and Environmental Affairs. These data are available for free through APIs from international weather sites, such as Weather Underground and yr.no.

Data is © 2015 South African Weather Service

Most, if not all, government departments publish tender information online, generally in PDF format. There is no single, machine-readable source of information across all of government.

The government makes available all promulgated acts, including amendments. Consolidated legislation is not available. Users must consolidate the legislation themselves.

There are aggregators of legislation making this data available in HTML and PDF formats. See http://www.acts.co.za/index.html, http://www.lawsofsouthafrica.up.ac.za/, http://www.saflii.org/za/legis/num_act/

Data on Air pollution is available on the website in a non machine readable format and is shown in Graph or a Map view . The raw data is only available on request from the agency in a XLS format.

Users must subscribe and pay for access to company data such as directors, addresses and registration details. http://www.cipc.co.za/index.php/find-enterprise-ip-informatr/moo2/public-disclosure/

The department of water and sanitation monitors the quality of South African water through programs such as the Blue Drop System. It is not clear how to get at the data or in what form it is available.

According to the Ministry of Finance: http://www.treasury.gov.za/ is collecting this data but it appears not to be accessible publically from an official source.

National Geo-spatial Information (NGI), a component of Department of Rural Development and Land Reform (DRDLR) commenced with the establishment of an integrated survey system and provision of extensive mapping coverage of the country. NGI is also known as South Africa's national mapping organisation.

The Dept completed a land audit in 2015 in which it states:

The State Land Audit serves to underpin this. It has now been completed and the relevant data vetted and verified. We now know who owns what part of South Africa; what land the State owns and where it is located.

However, this information does not appear to be available to the public.

Here is an extract from the website terms of use (there is no specific licence attached to the post codes database):

• Unless otherwise indicated, users are welcome to copy, download or print any of the visible text or images on this website for personal and non-commercial use.
• Users wishing to utilise content for their own commercial purposes may only do so with prior written permision of the website owner. Requests for commercial use may be submitted by e-mail to customer.services@postoffice.co.za