In this basic tutorial, we’ll download Landsat image, and create band pan sharpened in erdas imaging. Introduces the composite band of spatial band. Although all Landsat data is available on the USGS: Glovis.
The specific objectives include:
- Familiarize with Erdas
- To create custom Pan-sharpened Erdas Image
- Basic to created model in Erdas
The data used in this lab were included:
- Landsat 8 OIL (using band6, band5, band2 and band pan8) Please download dataset your location
- Extract boundary (Choose study area)
Exercise 1: Preparing dataset for created a model
Add data’s into ERDAS
- Click Start ERDAS and open a New Map Document
- Go to Raster Tab -> Spectral -> Choose Layer Stack it show later selection and stacking dialogue box,
- Select the input files (Input File: (*.img) as import raster data in folder E:DocumentsGIS-Geotrain8. Created Model in Erdas1.DatasLandsat datas -> Files of type: -> choose TIFF and selected on Band 2 -> Ok -> Click Add
- Data Type: choose Unsigned 16 bit
- Output Options: keep default
Stack image – Landsat 8 OLI
- Select output file: Output File: (*.img) -> to folder E:/Documents/GIS-Geotrain/8. Created Model in Erdas/2. Output file/
- File name: CombineBand652
- Files of type: TIFF ->Ok it show Process List dialogue box -> Click Close.
- Go to File Tab -> Open -> Choose Rater Layer… -> navigation to output folder E:/Documents/GIS-Geotrain/8. Created Model in Erdas/2. Output file/
- File of type: choose TIFF -> selected on CombineBand652.tif -> Click Ok
- It to show left contents -> Right click on CombineBand652.tif -> Fit layer To window
- Home Tab -> Inquire -> Inquire box (Ctrl+B) let me zoomed to study area.
- Raster Tab -> Subset -> Create Subset Image -> Click from Inquire Box -> Save to output file (*.img) -> StudyArea_Band652.tif ->Ok -> Ok -> Click Close.
- tif as input raster again.
- Go to File -> Go to File Tab -> Open -> Choose Rater Layer… choose Band 8 save as name Pan_Band_8.tif to output folder.
To Create Custom Pan-sharpened
- Ongoing to Raster tab -> Select on PanSharpen and scroll down and choose Wavelet Resolution Merge:
- In High Resolution Input File. (*.tif) as import an image high resolution tiff
- In Multispectral Input File: (*.tif) as import an multispectral Studyarea_Band652
- In Output File: (*.img) save as into your directory folder.
Pan-sharpened in Erdas
Basic to created model in Erdas
- Please navigated to Toolbox -> Clicking on Spatial Model Editor you can see a Spatial Model Editor window for building our modeling.
Created Model in Erdas
- From the Operators pane -> scroll down click on Input category -> Raster and drag Raster input into the Spatial Model Editor #1: Spatial Model viewer. And double clicking on Raster Input -> go to output folder choose studyarea_band234567.tif set as Interpolation -> choose Bilinear Interpolation and Read as: Float -> Click Ok.
- And go to Input category -> Matrix ->Selected Kernel Matrix Input drag in to viewer and double click Kernel Matrix Input as Kernel Selection -> 5×5 Low Pass -> Ok.
- Analysis category -> Convolve tool drag into viewer
- Math & Trig -> scroll down choose Divide drag.
Spatial Model in Erdas