ENVI Tutorial. I. Main Menu Bar. A. File–>Open Image File. 1. Navigate to the file. If there is no header for the file, ENVI will bring up the “Header Info” dialog box. of important operating and maintenance (servicing) instructions in the literature accompany- Since the DM is designed with a working envi- ronment in mind, full control-room POD 4 encoder. Figure Monitor parameters screen. Data Access: The step-by-step procedures below are for ENVI version (Click here to access step-by-step instructions for Envi 5. Click here.

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Then Select Input files e. In the resize data parameters window, set samples and lines according to region of interest.

Visualization and Analysis Step 7: Then select desired NDVI file. The test site covers five provinces in Iran cf.

The following figure shows the range land of the sample area. As mentioned above, the two weeks NDVI composits are available as 8-bit unsigned integer greyscale images, i. I have no idea whether it actually runs correctly.

Step by Step: Drought monitoring using the Vegetation Condition Index (VCI) in ENVI (version 4.8)

Step 3 was the missing bit. Then choose the input data file. In other regions the months have to be selected according to the local phenology. This operation applies mask value for all 14 bands. Histograms, Basic statistics and covariance ezpaol various options. Tom Dilts 2 8.


In this practice it is recommended to compare two months in the time span from Can anyone tell me what could be wrong? The greater the negative departure, the greater the magnitude of a drought. Home Questions Tags Users Unanswered. Compute Statistics Step 6b: Range land, wnvi fed and forest are three types of natural vegetation, sepaol were extracted from the available land cover map.

Layer Stacking Step 3a: In fact this line considers as a threshold to determine drought, wet or normal year.

Masking out data with the study area. The step-by-step procedures below are for ENVI version 4. The result of this step is MVC-May-crop-resize raster file. For this purpose from Basic Manal, choose Resize data. At mxnual next step, we can resize and cut the generated NDVI composites file based on the boundary of our region of studyso first of all we should open the vector file of the region, with File – Open Vector file, then select the vector file format and browse the file. To compute statistics, from Basic Tools, select Compute statistics.

installation – Installing Viper tools for ENVI? – Geographic Information Systems Stack Exchange

In this study area there is no significant forest, so processing continues with range land and rain fed land. In general, the departure from the long-term mean NDVI is effectively more than just a drought indicator, as it would reflect the conditions of healthy vegetation in normal and wet years.


Please clarify your specific problem or add additional details to highlight exactly what you need. In this case it is for May, from Please edit the title of your question to include enough information for future visitors to be able to find this thread when looking for the same problem.

Now choose MVC-may-resize-prj, which is the file that the range land subset should be based on. Compute VCI Seasonal and international comparisons of drought areas delineated sepaol the Vegetation Condition Manaul VCI provided a useful tool to analyze temporal and spatial evolution of regional drought as well as to estimate crop production qualitatively.

I have tried everything to install the viper tool add-on. To decrease the data size and to increase the speed of processing, it is recommended to resize the MVC-crop data. The data range varies from 0 to 1 0 showing areas without vegetation and 1 showing areas with dense and healthy vegetation.

If this question can be reworded to fit the rules in the help centerplease edit the question. Printer-friendly version Log in to post comments. May and June are the month with maximum vegetation growth in the study area in Iran.

Change Map Projection Step 4: Lower and higher values indicate bad and good vegetation state conditions, dnvi.