Complete Remote Sensing and GIS - ArcGIS - Erdas

Connect to your data folders in ArcGIS by adding folder connections to local drives, then organize and load data before starting a remote sensing and GIS project.

Connect a folder as a project folder in ArcGIS to streamline access to data. Add the folder once, then view its contents instantly without repeated browsing.

Georeference in arcgis by assigning a projection, selecting a geographic coordinate system, adding data, and using control points to rectify to decimal degrees, creating a copy to preserve originals.

Learn to find the UTM zone using GIS by loading a reference system file, adding and rectifying layers, adjusting labels, and interpreting area values shown by the map.

reproject data by applying a projection into a coordinate system, then export spectral reference data to a chosen output folder, and verify the coordinate system in properties.

Create a basic shapefile in ArcGIS by defining a polygon feature and setting its coordinate system. Edit the boundary accurately, save edits, and organize the project within folders.

Save your work in a folder to resume later by saving a project file that links to data, then reopen to continue from where you left off.

Create two polygons with the same boundary in a shapefile using edit features and auto complete polygon in ArcGIS; start inside a polygon, then double-click to finish and save edits.

Enable the editor toolbar, start editing in ArcGIS, and use circle, center, and corner snapping to ensure vertices snap to lines for higher digitisation accuracy.

Learn to cut polygons by selecting the polygon, using the polygon tool from the edit toolbar, and starting and ending the cut outside the area to create two separate polygons.

Learn to join two polygons by editing in the editor toolbar, selecting both polygons with the pen tool and shift-click, then using the edit toolbar to merge and confirm.

Define and edit an attribute table for polygon features, adding fields like category, name, and remarks; populate and save attributes to enable meaningful symbology.

Apply attribute table data to map symbology by category, assigning colors for agriculture, city, forest, and water, adjust values, and view color changes in ArcGIS.

Create a point shapefile and enter rainfall data by using arc catalog, editing attributes, and setting a coordinate system, then add fields and capture weather station observations for interpolation.

Create a road line shapefile by defining a polyline feature, setting the projection, and editing road features; build an attribute table with a name field and assign road names.

Display feature names by labeling attributes in the map, using the label field and properties, then adjust category and symbology for clear visualization.

Learn how to calculate the area of multiple shapes in square kilometers by adding an area field, computing geometry, setting units, and formatting decimal places in ArcGIS or Erdas.

Display multiple data by labeling features with names and areas, define classes and label each class differently, apply colors, and show kilometre square symbols.

Download shapefiles for country, state, or district data, verify projection, and use ArcGIS tools to select features and export them as new shapefiles to isolate specific regions.

Learn how to clip a shapefile with another to extract the inside shapes, using the clip tool, defining input feature and output, and understanding hollow boundaries in ArcGIS Erdas.

Add online base maps and compare your data against satellite imagery and street maps to verify accuracy, understanding loading times and internet requirements.

Download and install QGIS, the open source GIS tool, choosing 64-bit if your computer supports it. Then download a street map and load it into QGIS for mapping tasks.

Download street level vector data from OpenStreetMap using the Overpass API, select an area by latitude and longitude, export and download, then convert the file for GIS use.

Convert various vector data types to shapefiles by using the data source manager to add lines, polygons, and points, then export each feature as a shapefile for GIS workflows.

Connect to a web map service by adding a WMS from an online server, select land use data, view layers, and export the map to the Djibouti format.

Explore how satellite images are structured and the role of red, green, blue, near infrared, and thermal bands, with free options like Landsat and Sentinel and cloud-free imagery.

Understand how satellite orbits affect data capture dates, with north-south pole passes causing 10 to 15 day differences and cloud disruptions, and learn basic processing using USGS data.

Explore the Landsat band info site for satellite band documentation and NASA resources, with downloadable data to support your remote sensing study.

Learn to download satellite images by selecting area on the map, searching by place name or coordinates, and choosing Landsat 8 data with under 10% cloud to create a mosaic.

Process downloaded satellite images in ArcGIS using embedded scripts, create single color composites from multispectral bands, adjust display, and export processed data from USGS sources.

Master manual processing in ArcGIS for remote sensing by selecting bands, building image composites, and exporting data to refine spectral signatures.

Stack satellite images in ERDAS by stacking multiple files, selecting spectral bands, and saving a processed multi-band TIFF for improved image visualization.

Learn to set no data values in ERDAS by selecting an image, computing statistics, and applying no data to remove black pixels and prepare images for analysis.

This lecture explains how to prepare satellite images for mosaicking by selecting low-cloud, month-to-month images, matching brightness, and removing bad data through precise edge cutting and subsets.