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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This operation applies mask value for all 14 bands. Are you getting any sort of error? Printer-friendly version Log in to post comments.

IN the espaoo figure the distribution of range land is shown. Skip to main content. I have tried everything to install the viper tool add-on. Would you like to answer one of these unanswered questions instead? At the 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 fspaol, with File – Open Vector file, then select the vector file format and browse the file.

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

In order to compare average monthly NDVI between tostatistics of finalized data need to be computed. I have no idea whether it actually runs correctly.

So a ejvi which represents the provinces will limit the data. Step 3 was the missing bit. Therefore from the basic tools menu select Masking and then Apply Mask.


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. Compute Statistics Step 6b: It is recommended to reduce the amount of data to decrease the time for computing. So the output maual 14 bands or 14 VCI from to For this purpose from Basic Tools, choose Resize data.

Related Practices Recommended Practice: Sitemap Contact Terms of Use Privacy. Change Map Projection Step 4: Masking out data with the study area Range land, rain fed and forest are three types of natural vegetation, which were extracted from the available land cover map. Additionally, two products come with a water mask: A month-by-month May and June spatial distribution of VCI in the study area during the period is processed.

In order to illustrate the drought condition in study area, a line fits to the mean NDVI in period The result is a new file including all MVCs for May. Masking out data with the study area. In this case it is for May, from Instructions for ENVI 5. Do you know a valid link to download viper? By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

In Mask parameters window, the mask value should be set to -1, since the minimum value of NDVI is The test site covers five provinces in Iran cf. For more details on the band math operation cf.

The following figure shows the range land of the sample area. In fact this line considers as a threshold to determine drought, wet or normal year. Final result is range-cut.


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Envl installation method did you use? Tom Dilts 2 8. Please note that there are also other solutions to cut or crop a raster file in ENVI. Masking out data with the study area Step 5: Data preparation Step 1: Can anyone tell me what could be wrong?

Here we show the procedure for one month. Please clarify your specific problem or add additional details to highlight exactly what you need. Tried the installation method given in the user manual and also the method suggested above.

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

Then select desired NDVI file. Visualization and Analysis Step 7: The step-by-step procedures below are for ENVI version 4. Are those tools supported at that version of ENVI?

In the resize data parameters window, set samples and lines according to region of interest.

From available vector list window you can simply load this vector file. The band math screenshots below were done in Envi 5. Range land, rain fed and forest are three types of natural vegetation, which were extracted from the available land cover map.

May and June are the month with maximum vegetation growth in the study area in Iran.