The compression tests that you see below were completed on a Sony Vaio Laptop with 12 gb of RAM, a 64-bit Windows 7 Professional operating system and an Intel Core i7-3520M CPU running at 2.90 Ghz. 7z appears to be the best format for file compression, and that is part of the inspiration for this G-FAQ. On the 7-Zip website, they show test results where. You can read more about 7-Zip’s features here.
SPAM WITH A .7Z FILE EXTENSION FREE
While there are a plethora of freeware programs that can create compressed files, here is a list of some good options:īut my favorite freeware program is 7-Zip which is also featured in this month’s Free For All. tar (does not actually compress, it just bundles multiple files together into one) and. Some compressed file formats you might be familiar with are. Suffice it to say that compression saves space by looking for repeating patterns in words, numbers and images and then by replacing them with shorter data strings in the compressed file. In past G-FAQs, I have spent some time introducing the principles behind the topics discussed this month, however, I will leave the principles of file compression to the experts – if you want to read more about the topic, check out this through summary. Is there a format that is better for short versus long-term storage?.What freeware applications are offered for file compression?.What is the best compression format for TIFFs?.With this in mind, the January G-FAQ will address this core set of questions: I have compressed my archival copies of client orders for some time now to reduce the amount of hard drive space needed for long-term storage and thus, to save a bit of money. Now consider the enormity of a 1-foot aerial collection over an entire county, and surely the topic of file compression now makes a bit more sense. Take for instance the minimum order of 25 square kilometers (sq km) of 50-centimeter (cm) WorldView-2 imagery with 8-bit depth, this dataset alone is 400 megabytes (mb). Specifically, I look at file compression of TIFFs which are commonly large datasets that we have to store for both short and long time periods. For this month’s Geospatial Frequently Asked Question (G-FAQ), I explore a topic that perhaps some of us have given little consideration to: file compression.