Es 341 - PowerPoint PPT Presentation
Demonstration of Applied Exercises in Geographic Information Systems
Demonstration of Applied Exercises in Geographic Information Systems. Lower Siletz River, Oregon. Richard Fletcher, Patrick Stephenson, Earth Science Majors, Western Oregon University, Monmouth, OR, 97361. ES 341: Fundamentals of GIS. USGS 7.5 Min DRG Topographic Maps.
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1. Je jasno v duÅ¡i mojà dnes vÃc | ne ž li bývá tam, | kam slunko zá Å™ à z blankytu: | mn Ä› zá Å™ à Je ž ÃÅ¡ sám. | Jaké jasno, krásné jasno, kdy ž ty blahé, Å¡ Å¥ astné chvÃle jsou, v nich ž Je ž ÃÅ¡ovu z Å™ Ãt smÃm tvá Å™ , tu je jasno v duÅ¡i mé.
CMSC 341
CMSC 341. Introduction to Trees. Tree ADT. Tree definition A tree is a set of nodes. The set may be empty If not empty, then there is a distinguished node r , called root and zero or more non-empty subtrees T 1 , T 2 , … T k , each of whose roots are connected by a directed edge from r.
CMSC 341
CMSC 341. Introduction to Trees. Tree ADT. Tree definition A tree is a set of nodes which may be empty If not empty, then there is a distinguished node r , called root and zero or more non-empty subtrees T 1 , T 2 , … T k , each of whose roots are connected by a directed edge from r.
CMSC 341
CMSC 341. Graphs – DFS Expanded. Depth First Traversal with Finish Times. dfs(Graph G) { for (each v V) d[v] = 0 // d = discovery “time” time = 0 // “global” variable for (each v V) if (d[v] = 0) // not discovered yet dfs (v) } dfs(Vertex v) { time = time + 1
CMSC 341
CMSC 341. B- Trees D. Frey with apologies to Tom Anastasio. Large Tree. Tailored toward applications where tree doesn’t fit in memory operations much faster than disk accesses want to limit levels of tree (because each new level requires a disk access) keep root and top level in memory.
CMSC 341
CMSC 341. K-D Trees. K-D Tree. Introduction Multiple dimensional data Range queries in databases of multiple keys: Ex. find persons with 34 age 49 and $100k annual income $150k GIS (geographic information system) Computer graphics
CMSC 341
CMSC 341. B- Trees D. Frey with apologies to Tom Anastasio. Large Tree. Tailored toward applications where tree doesn’t fit in memory operations much faster than disk accesses want to limit levels of tree (because each new level requires a disk access) keep root and top level in memory.
CMSC 341
CMSC 341. Binary Heaps Priority Queues. Priority Queues. Priority: some property of an object that allows it to be prioritized with respect to other objects of the same type
CMSC 341
Making Java GUIs Functional. CMSC 341. More on Swing. Great Swing demo at http://java.sun.com/products/plugin/1.3.1_01a/demos/jfc/SwingSet2/SwingSet2Plugin.html Just google for “SwingSet Demo Java” Now let’s learn how to make GUIs functional. Last Class. Learned about GUI Programming.
CMSC 341
CMSC 341. Asymptotic Analysis. Complexity. How many resources will it take to solve a problem of a given size? time space Expressed as a function of problem size (beyond some minimum size) how do requirements grow as size grows? Problem size number of elements to be handled