ASSESSING the ACCURACY of REMOTELY SENSED DATA - CHAPTER 2 pptx

... labels or classified data generated from the remotely sensed data. Thus, two labels from each sampleare compared to one another:• Reference data labels: the class label of the accuracy assessment ... building andanalyzing of an error matrix are the main themes of this book.L986ch 02. fm Page 10 Monday, May 21 , 20 01 11:34 AM©1999 by CRC Press CHAPTER 2 Overview The history of remote sensing is ... little over 2 decades. However, it was the development of these digital devices thathad the most profound impact on accuracy assessment for all remotely sensed data. AERIAL PHOTOGRAPHY The first...

ASSESSING the ACCURACY of REMOTELY SENSED DATA - CHAPTER 1 ppt

... as the infraredportions of the electromagnetic spectrum. The accuracy of maps made from remotely sensed data is measured by two types of criteria: location accuracy and classification or thematic ... sample data. The organization of this book takes you through each of these fundamental steps. Chapter 2 begins with a discussion of the history and basic concepts of accuracy assessment. Chapter ... estimate the accuracy of maps. Accuracy assessment requires (1) the design of unbiased and consistent sampling procedures, and (2) rigorous analysis of the sample data. ORGANIZATION OF THE BOOKMore...

ASSESSING the ACCURACY of REMOTELY SENSED DATA - CHAPTER 4 pot

... forms, regardless of their complexity, have some com-mon components. These include (1) the name of the collector and the date of the L986ch04.fm Page 38 Tuesday, May 22 , 20 01 12: 23 PM©1999 by ... requires trade-offs between the remotely sensed data used to create the map and the level of accuracy required by the project. We acceptsome level of error as a trade-off for the cost savings ... period.Therefore, accuracy assessment reference data should be collected as close aspossible to the date of the collection of the remotely sensed data used to make the map. However, trade-offs...

ASSESSING the ACCURACY of REMOTELY SENSED DATA - CHAPTER 5 ppt

... to the use of the Kappa coefficientfor assessing the accuracy of remotely sensed classifications because the degree of chance agreement may be over-estimated (Foody 19 92) . Remember from the ... nnnnniiikiiikiiik=−−=++=++=∑∑∑11 2 1varˆˆKn()=−()−()+−()−()−()+−()−()−()111 21 2 114111 2 21 123 2 31 2 42 2 2 4θθθθθθθθθθ θθθ111==∑nniiikθ 2 211=++=∑nnniiikθ3 2 11=+()++=∑nnn nii i iikθ43 2 111=+()++==∑∑nnn ... agreement.”Then the weighted Kappa is defined by.To compute the large sample variance of the weighted Kappa define the weightedaverage of the weights in the ith category of the remotely sensed...

ASSESSING the ACCURACY of REMOTELY SENSED DATA - CHAPTER 6 doc

... from the one used to create the map—a common occurrence when existing data or maps are used as reference data. • Changes in land cover between the date of the remotely sensed data and the date of ... IN THE REFERENCE DATA A major assumption of the error matrix is that the label from the referenceinformation represents the “true” label of the site and that all differences between the remotely ... another which the fire throws on the opposite wall of the cave ….To them … the truth would be literally nothing but the shadows of the images. (Plato, The Republic, Book VII, 515-B, from Benjamin...

ASSESSING the ACCURACY of REMOTELY SENSED DATA - CHAPTER 7 docx

... map are notcorrelated), then probability tells us that the accuracy would be computed by mul-tiplying the accuracies of the layers together. Therefore, the accuracy of the finalmap is 90% × ... Wednesday, May 16, 20 01 11 :23 AM©1999 by CRC Press the exact same place in all four layers), then the accuracy of the final map is 90%.In reality, neither of these cases are very likely. There is usually ... order to obtain the highest classifi-cation accuracy. Because all of the cells of the matrix are considered, the Kappacoefficient of agreement was the recommended measure of accuracy. To date,...

ASSESSING the ACCURACY of REMOTELY SENSED DATA - CHAPTER 8 (end) ppt

... assess the accuracy of both the newmap and the photo-based map. This chapter concentrates on the methods, assump-tions, and results of the accuracy assessment portions of the project. The sampledesign, ... up the reference data (the data againstwhich the map is compared) during accuracy assessment. 2. The map site label refers to the map label of the accuracy assessment site. In thisproject the ... 52, No. 2, pp. 22 3 -2 27 .Rosenfield, G.H., and M.L. Melley. 1980. Applications of statistics to thematic mapping.Photogrammetric Engineering and Remote Sensing. Vol. 46, No. 10, pp. 128 7-1 29 4.Rosenfield,...

Báo cáo khoa học: "Assessing the Role of Discourse References in Entailment Inference" pptx

... handling of discourse relations in vir-tually all entailment systems. They include the use of off -the- shelf resolvers that concentrate on nom-inal coreference, the integration of reference in-formation ... partially supported by the PASCAL -2 Network of Excellence of the Eu-ropean Community FP7-ICT -2 0 0 7-1 -2 1 6886 and the Israel Science Foundation grant 11 12/ 08. 121 7belegalalsounionsuchpredmodsubjbelegalalsomarriageshomosexualpredmodsubjmodTT1marriageshomosexualmodT’preFigure ... assess the validity of the lo-cal replacement of the T entity by the H entity.While transformation- and alignment-based en-tailment models look different at ﬁrst glance, theyultimately have the...

The Basics of Oil Spill Cleanup - Chapter 2 docx

... severity of the spill. The purpose of contingency plans is to coordinate all aspects of the response toan oil spill. This includes stopping the flow of oil, containing the oil, and cleaningit up. The ... escalate as the incident becomes more serious. As the seriousness of an incident is often not known in the initial phases, one of the firstpriorities is to determine the magnitude of the spill ... emphasizes the needfor a detailed contingency plan for this phase of the operation and the importance of a high level of training in first response.Stopping the flow of oil is a priority in the first...

Báo cáo sinh học: " Does probabilistic modelling of linkage disequilibrium evolution improve the accuracy of QTL location in animal pedigree?" pptx

... 0 .25 0.5Ne100 20 0 400 400Ng50 20 0Ns 20 20 10Np100 50 50dens 0 .25 0. 125 0.5HaploMax 2. 018 1.431 2. 138 2. 134 2. 496 2. 774 2. 493 2. 840 2. 054HAPimLDL 2. 165 1. 528 2. 114 2. 296 2. 716 2. 990 ... effect of selection and one to study the influence of mutation.We simulated a set of half-sib families. Two para-meters- the number of sires (equal to 10, 20 , 25 , 50 or100) and the number of progeny ... markers 2 4 2 4Ns 20 1.66 1 .26 1.66 1 .26 Np100Ns100 1.65 1.11 1.71 1.15Np 20 Ns 20 1.68 1.36 1.74 1.45Np50Ns50 1.73 1. 32 1.83 1.46Np 20 Ns 20 1.73 1.39 1.81 1.47Np 25 Ns 25 1.83...

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