spatial analysis in gis techniques
university of calgary press space and spatial analysis in archaeology dec 2005
... Americas, spatial analyses continued to be important, and indeed blossomed as archaeologists sought to explain inter- cultural regularities through the analysis of the spatial patterning of architecture ... Stein (1993) within an important call for rethinking the scale and resolution at which ge- oarchaeology should operate. 3 This point is powerfully made by Frodeman (1995, 2003) in examining ... between these lines of evidence. As ecological concerns became increasingly impor- tant in archaeology, spatial approaches to the analysis of archaeological remains expanded to include settle- ment...
Ngày tải lên: 11/06/2014, 16:57
Báo cáo toán học: " Analysis and modeling of spatial characteristics in urban microscenario of heterogeneous network" potx
... in 3GPP. The interference from the other two sectors within the same site is defined as intra-cell interference, while the interference from the other sites is defined as inter-cell interference. ... interference. The ratio of the intra-site interference to inter-site interference is defined as R = I intra I inter (14) From the simulation results illustrated in Figure 13, the proposed angular ... system in which the angle spread is minimized need to be determined. Offset values are obtained by subtracting the mean angles of all paths from LoS direction in the coordinate system. According...
Ngày tải lên: 20/06/2014, 21:20
KEY CONCEPTS & TECHNIQUES IN GIS pdf
... category ‘vegetation’ in the original landcover dataset. We will revisit the topic of creating new data rather than just querying existing data in the next chapter on combining data. This sneak preview is an indicator ... location, it looks what information there is in one feature class, then in the 6 Combining Spatial Data Albrecht-3572-Ch-06.qxd 7/13/2007 5:08 PM Page 37 SPATIAL SEARCH 25 the principle. Here, we ... when looking for all dry cleaners within a city to check for the use of a certain chemical. In the following we will look at spatial queries, starting with some very basic examples and ending with...
Ngày tải lên: 27/06/2014, 08:20
Analysis and Modeling in GIS pps
... layer in T of C, select Join/Joins and Relates, then click down arrow in first line of Join Data window see Joining Data in Help for details) – Use for: points in polygon lines in polygon points ... http://www.utdallas.edu/~briggs/other _gis. html 32 07/07/14 Ron Briggs, UTDallas GISC 6381 GIS Fundamentals Single most common error in GIS Analysis intending a one to one join of attribute to spatial table getting a one ... theory. In set theory, the union contains everything that belongs to any input set, but original set membership is lost. In a GIS union, all original set memberships are explicitly retained. In...
Ngày tải lên: 07/07/2014, 04:20
KEY CONCEPTS & TECHNIQUES IN GIS Part 1 pps
... Overlay as a coincidence function 38 Figure 25 Overlay with multiple input layers 39 Figure 26 Spatial Boolean logic 40 Figure 27 The buffer operation in principle 41 Figure 28 Inward or inverse buffer ... Buffering in spatial search 43 6.5 Combining operations 43 6.6 Thiessen polygons 44 7 Location-Allocation 45 7.1 The best way 45 7.2 Gravity model 46 7.3 Location modeling 47 7.4 Allocation modeling ... software in mind – and in any case were not made aware of modern methods and techniques. This book also addresses decision-makers of all kinds – those who need to decide whether they should invest in...
Ngày tải lên: 05/08/2014, 21:22
KEY CONCEPTS & TECHNIQUES IN GIS Part 2 pptx
... handling are all important topics; but, in most instances, a standard textbook on database management would provide an adequate introduction. More interesting are concerns arising from the combination ... non-sampled locations are then interpolated assuming continuous distri- butions. The interpolation techniques will be discussed in Chapter 10. Currently unresolved are the sampling of discrete phenomena, ... synopsis of the use of image analysis techniques as a source for spatial data repositories is in order. Traditionally, the two fields of GIS and remote sensing were cousins who acknowledged each...
Ngày tải lên: 05/08/2014, 21:22
KEY CONCEPTS & TECHNIQUES IN GIS Part 3 potx
... resort to a process known as rubber sheeting, where we interac- tively try to link as many individually identifiable points in both datasets to gain enough information to perform a geometric transformation. ... when looking for all dry cleaners within a city to check for the use of a certain chemical. In the following we will look at spatial queries, starting with some very basic examples and ending with ... working with is to collect all the primary data oneself and to have complete control over all aspects of acquisition and processing. In the light of the costs involved in creating or accessing existing...
Ngày tải lên: 05/08/2014, 21:22
KEY CONCEPTS & TECHNIQUES IN GIS Part 4 pps
... what information there is in one feature class, then in the 6 Combining Spatial Data Albrecht-3572-Ch-06.qxd 7/13/2007 5:08 PM Page 37 COMBINING SPATIAL DATA 39 The question ‘Which soils occur in ... extracting all different vegetation types and then recombine these to form a new dataset containing all kinds of vegetation and nothing but vegetation. In both of these examples, we are creating 5 Spatial ... querying existing data in the next chapter on combining data. This sneak preview is an indicator of the split personality of the recoding operation; it could be interpreted as a mere data maintenance...
Ngày tải lên: 05/08/2014, 21:22
KEY CONCEPTS & TECHNIQUES IN GIS Part 5 doc
... have in GIS. Map algebra is inherently raster-based and therefore not often taught in introductory GIS courses, except for applications in resource management. Traditional vector- based GIS basically ... sums 36 33 40 109 To Destinations Albrecht-3572-Ch-07.qxd 7/13/2007 4:16 PM Page 50 Among the main reasons for wanting to use a GIS are (1) finding a location, (2) finding the best way to get ... in form of equations. Every map algebra expression has the form <output = function(input)>. The function can be unary (applying to only one operand), binary (combining two operands as in...
Ngày tải lên: 05/08/2014, 21:22
KEY CONCEPTS & TECHNIQUES IN GIS Part 6 docx
... CONCEPTS AND TECHNIQUES IN GIS By default, the neighborhood is defined to be all eight cells touching the processing cell, plus the processing cell in the middle. As an interesting aside, the ... that the minimum interior angle of all of the triangles is maximized and long, thin triangles are avoided. In the process of calculating the best fitting triangles between all the points that ... determine the spatial relationship between cells of interest – or in other words, the distance between cells. Albrecht-3572-Ch-08.qxd 7/13/2007 4:16 PM Page 57 54 KEY CONCEPTS AND TECHNIQUES IN GIS 2011 2304 423 11...
Ngày tải lên: 05/08/2014, 21:22
The yield gap of global grain production-A spatial analysis
... reaching markets. Ac- cess can therefore not explain the variance in efficiency of Chinese wheat production. Market in uence (market), as a proxy for land rent indicating the investments in machinery, ... these interact with local constraints. The results of our analysis have confirmed that the factors explaining inefficiencies in production widely vary by region. Furthermore, factors explain- ing ... 2010 Available online 26 March 2010 Keywords: Grain production Yield gap Land management Intensification Inefficiency Frontier analysis abstract Global grain production has increased dramatically during the...
Ngày tải lên: 16/12/2012, 15:22
Electric and hydrogen consumption analysis in plug-in road vehicles
Ngày tải lên: 05/09/2013, 14:58
Multi criteria analysis in environmental management: Selecting the best stormwater erosion and sediment control measure in Malaysian construction sites
Ngày tải lên: 05/09/2013, 16:11
