ASSESSING the ACCURACY of REMOTELY SENSED DATA - CHAPTER 4 pot

... ability. Tables 4- 3 and 4- 4 show the results of comparing the two collection approaches for crown closure. Table 4- 3 presents the crown closure of the dominant size class results, while Table 4- 4 shows the ... reference data should be collected as close as possible to the date of the collection of the remotely sensed data used to make the map. However...

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 ... thematic accuracy. Location accu- racy refers to how precisely map items are located on the map relative to their true location on the ground. Thematic accuracy refe...

Ngày tải lên: 11/08/2014, 06:22

... 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 ... decades. However, it was the development of these digital devices that had the most profound impact on accuracy assessment for all remotely sensed data. AERIAL...

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... 0 3 43 4 0 3 24 0 4 0 3 24 0 4 4 34 0 0 74 0 1 0 0 74 0 1 43 4 0 173 0 2 0 173 0 2 43 4 0 00 040 ˆ P ˆˆ PVP cc = () [] 2 12 ˆ ., P c =± () =± () =± = () 0 741 2 0 00 04 0 741 2 0 02 0 741 0 04 0 ... regard to the location of these areas. In other words, a comparison between the number of acres or hectares of each category on the map generated from remotely...

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% × ... order to obtain the highest classifi- cation accuracy. Because all of the cells of the matrix are considered, the Kappa coefficient of agreement was the recommende...

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, ... using a four- or six-digit code indicating path/row(s) (e.g., 44 /33, 44 /3 2-3 3) 8. Observation level—used as an indicator of the potential accuracy...

Ngày tải lên: 11/08/2014, 06:22

... down there in a minute." THE VALLEY OF THE MOON JACK LONDON BOOK 1 CHAPTER 4 After dinner there were two dances in the pavilion, and then the band led the way to the race track for the ... taking their positions along the rope. They kicked heel-holds in the soft earth, rubbed their hands with the soil from underfoot, and laughed and joked with the crow...

Ngày tải lên: 06/07/2014, 00:21

... Through the process of dissolution, some of the most soluble components of the oil are lost to the water under the slick. These include some of the lower molecular weight aromatics and some of the ... the future. In addition to predicting the trajectory, these models can estimate the amount of evaporation, the possibility of emulsification, the amount o...

Ngày tải lên: 11/08/2014, 04:20

... water line to the top of the boom. The skirt is the portion of the boom below the floats or flotation that helps to contain the oil. It is usually made of the same types of fabric as the freeboard ... The freeboard member is the portion of the boom above the water, which prevents oil from washing over the top of the boom. The term freeboar...

Ngày tải lên: 11/08/2014, 04:20