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 sample are compared to one another: • Reference data labels: the class label of the accuracy assessment ... building and analyzing 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 Ove...

Ngày tải lên: 11/08/2014, 06:22

... as the infrared portions 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 con...

Ngày tải lên: 11/08/2014, 06:22

... 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 accept some level of error a...

Ngày tải lên: 11/08/2014, 06:22

... to the use of the Kappa coefficient for assessing the accuracy of remotely sensed classifications because the degree of chance agreement may be over-estimated (Foody 19 92) . Remember from the ... nn nnn ii i k ii i k ii i k = − − = ++ = ++ = ∑∑ ∑ 11 2 1 var ˆ ˆ K n () = − () − () + − () − () − () + − () − () − ()           1 1 1 21 2 1 14 1 11 2 2 1 1...

Ngày tải lên: 11/08/2014, 06:22

... 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 reference information represents the “true” label of the site and...

Ngày tải lên: 11/08/2014, 06:22

... map are not correlated), then probability tells us that the accuracy would be computed by mul- tiplying the accuracies of the layers together. Therefore, the accuracy of the final map 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...

Ngày tải lên: 11/08/2014, 06:22

... assess the accuracy of both the new map and the photo-based map. This chapter concentrates on the methods, assump- tions, and results of the accuracy assessment portions of the project. The sample design, ... up the reference data (the data against which the map is compared) during accuracy assessment. 2. The map site label refers to the map label of...

Ngày tải lên: 11/08/2014, 06:22

... 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...

Ngày tải lên: 30/03/2014, 21:20

... severity of the spill. The purpose of contingency plans is to coordinate all aspects of the response to an oil spill. This includes stopping the flow of oil, containing the oil, and cleaning it 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 first priorities is to de...

Ngày tải lên: 11/08/2014, 04:20

... 0 .25 0.5 N e 100 20 0 400 400 N g 50 20 0 N s 20 20 10 N p 100 50 50 dens 0 .25 0. 125 0.5 HaploMax 2. 018 1.431 2. 138 2. 134 2. 496 2. 774 2. 493 2. 840 2. 054 HAPimLDL 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 (equa...

Ngày tải lên: 14/08/2014, 13:21