SPDSS_Task89-2_CropLandUseClassificationProcedures_20060929

• Title: SPDSS Task 89.2 - Crop and Land Use Classification Procedures for Year 2001
• Description: This memorandum describes the activities conducted under Task 89: ‘Mapping of Irrigated Land Use and Irrigated Parcel Boundaries’ for year 2001 and complements the SPDSS Memoranda for Task 89.1 and Task 90.2. This memorandum also provides details on the methods used to conduct a number of Task 89 activities, including Task 89.3: Determine Irrigated Vs. Non-irrigated Lands, Task 89.4: Identify Crop Types In Each Polygon, Task 89.5: Review, Revision and Final Classification, and Task 89.6: Conduct Accuracy Assessment, as well as the results obtained from these activities for year 2001.
• Decision Support - Doc Type: Task Memorandum
• Date: 9/29/2006
• DSS Category: GIS
• DSS: South Platte
• Basin: South Platte
• Contract/PO #: C153960
• Grant Type: Non-Reimbursable
• Bill Number: SB01-157, HB02-1152, SB03-110, HB04-1221, SB05-084, HB06-1313, SB07-122
• Prepared By: Riverside Technology inc.

MEMO 89.2
2.5.2.2 Irrigated Crops Classification Procedure
The irrigated crop classification consisted of four steps: (1) irrigated lands masking; (2) Maximum
Likelihood Classification; (3) rule-based classification: and (4) classification refinement (Figure 12).
Irrigated lands Multitemporal Landsat
classification (Mask) image composite (All Bands)
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water users classification
Figure 12. Irrigated Crops Classification Procedure
In the first step, non-irrigated areas were eliminated from the multitemporal Landsat image composite by
applying the irrigated lands mask produced as described in Section 2.5.1. This procedure eliminated
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