ASSESSING the ACCURACY of REMOTELY SENSED DATA - CHAPTER 5 ppt

... The normalization process then tends to reduce the accuracy because of these positive values in the off-diagonal cells. If Table 5- 7 Normalized Error Matrix from Analyst #2 L986ch 05. fm Page 55 ... 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 (F...

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 ... discussion of the history and basic concepts of accuracy assessment. Chapter 3 introduces sampling design. Chapter 4 is devoted to the collection of referen...

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 ... in the 1 950 s some researchers saw the need for quantitative assessment of photo interpretation in order to promote their discipline as a science (Sammi 1 950 , Katz 1...

Ngày tải lên: 11/08/2014, 06:22

... 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 as a trade-off for the cost savings ... 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, trade-offs...

Ngày tải lên: 11/08/2014, 06:22

... 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, 51 5-B, from Benjamin ... 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...

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, ... Evaluation of several schemes for classification of remotely sensed data. Photogrammetric Engineering and Remote Sens- ing. Vol. 46, No. 12, pp. 154 7...

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 ... 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 fir...

Ngày tải lên: 30/03/2014, 21:20

... include the type and amount of oil, the degree of weathering of the oil, both before it reaches the shoreline and while on the shoreline, the temperature, the state of the tide when the oil washes ... shorelines. All of them are costly and take a long time to carry out. The selection of the appropriate cleanup technique is based on the type of substrate,...

Ngày tải lên: 11/08/2014, 04:20

... the filter medium is determined by the following: (1) the design of the filter (i.e., filter capsules or disks); (2) the material of construction of the filter medium; (3) the configuration of ... and M.J. Barcelona, Low-Flow (Minimal-Drawdown) Ground-Water Sampling Proce- dures, EPAu540u 5- 9 5u504, Ground Water Issue, U.S. Environmental Protection Agency, Office of...

Ngày tải lên: 12/08/2014, 05:21