Aimee Wolf December 27, 2020 Map
Though a globe model of the earth is the most common version of the earths surface, it would often create a lot of confusions to combine the political and physical maps together. Thats why maps are created for different purposes, which use map projection to depict the earths surface on a plane using a wide variety of scales. Digital maps also use map projections to present data on a computer screen. Different maps use different map projections based on what purpose the map will serve and the scale thats suitable for the purpose. For example, a type of map projection may show severe distortions while mapping the whole country, but may serve as an excellent choice for a countys detailed map that aims to cover a large area. The type of map projections also influences some of the design elements of a map. While some are suitable for small regions, some other projections are good for mapping areas with a huge north-south or east-west extent, or to cover all countries of the world.
Before happening any trip whether you are driving it or going by another other modes of transportation, it is essential to have a variety of travel maps available. The last thing anyone wants to have happen is getting lost on his or her trip. Being lost takes valuable excursion from enjoying yourself if it is a pleasure trip, or removes from working time if the trip is for business. There are several places to find travel maps, and most of them are easy to come by. The pair most obvious places in first getting travel maps is to go to your local grocery or convenience stores. They might not have a broad variety of maps, but theyre a really good source for guidelines that cover all of the US. Another obvious place to go to for obtaining maps, particularly road maps is most any gas station. Anyone who has ever been lost in a strange town knows how important gas stations can be when in desperate need of a guide.
The association map, in its simplest form, is just two keywords with a defined link. In terms of looks the diagrams are similar to a non-linear mind map, but structurally they have the more formal requirements of the concept map. The key point from a learning view, is that the relationship between the two keywords must always be clearly defined. A keyword may have many links to other keywords, but each pairing must have this well-defined link association. I have found the decisions one must make about these relationships have been some of the most useful in helping a student to overcome a misunderstanding, and in designing learning packages so that learners move more easily through a topic. Linking the unknown to the known has been a useful teaching strategy since time immemorial, and the association map is a particularly powerful way of tapping into this for some students.
Map projections are classified based on: Distortion characteristics: Some projections often need to show a particular area or its relative size accurately for distributions or other phenomena. These are called equivalent or an equal area projection. The Lambert Azimuthal projection that maps a sphere to a disk, and accurately shows all regions of the sphere is an example of this category. However, this equal area projection fails to represent angles with accuracy. The Albers projection is another instance of equal area map projection that utilizes two standard parallels. Despite no preservation of scale and shape, the distortion in this case is found to be minimal between the standard parallels.
There are other options worth knowing about: firstly the Active Maps which come in both Landranger and Explorer ranges and have a laminated, waterproof cover to protect your map from the rain and elements when out and about; secondly there are the custom-made maps which allow you to choose where the centre of your map will be. These are particularly handy if the route you want to follow will require buying 2 or more maps or you want maps of the countryside surrounding one central point on all sides e.g. the area around a campsite or accommodation or even your house! Both types of map are more expensive than basic OS Explore and OS Landranger maps. Check your whole walk area is covered: Select the type of map you require and then check on the map detail that your whole route is covered. The last thing you want is to realise that half your intended route is missing when you set off for your walk! If necessary you will need to get additional maps for adjoining areas. Each map has a number in the top right hand corner of the cover which along with the name is the reference you will need to select the correct map to purchase.
Internal cross links between lower level keywords are less common in mind maps and concept maps than they are in association maps, with the branching tree structure tending to take precedence. With concept and mind maps, the relationship of each word to the overarching theme remains paramount. In association maps, however, the link becomes the key, and, as stated, the process of deciding which type of link joins keywords together is a valuable part of ascertaining correct understanding. If you cant link two keywords effectively, you havent understood how they are related to one another! This pairing and linking process allows a jigsaw like approach to the development of the knowledge map, and enables a student always to be working from a point of understanding. Most interestingly, when used to develop a map for a new topic where one is not an expert, it is possible to identify the high level terms which will take precendence at the top of a concept map once an association map has been developed. This is because they are the ones with the most linkages. Development of an association map therefore gives a useful mechanism for allowing students to take on the expert role and develop their own concept maps, even when they are not fully confident in a subject. Drawing any of the three types of maps involves much more active learning than just using ready produced ones in my experience so this is a definite bonus. In summary, all mapping techniques provide a powerful method for organising key ideas within a topic or sub-topic. Mind mapping allows colourful creativity, concept mapping provides the confidence of professional correctness, and association mapping always lets you get started somewhere, but I have a sneaky suspicion, that the real power of visual mapping is the process your brain goes through when you develop those non-verbal links for yourself, so get a pencil and get started!