When To Order High Resolution Satellite Imagery Ghassan Mikati, Ph.D GIS Expert

Is the purpose of the study to extract recent ground features/changes? Yes No -New Buildings -New Roads -Changes in Land Cover Questions to be asked before acquiring new satellite imagery

Is the area big enough to justify the acquisition? -Parcel level -City level -Country level Questions to be asked before acquiring new satellite imagery YesNo

Are such changes detectable on Satellite images? -Size of New Features -Location of new features Questions to be asked before acquiring new satellite imagery Yes No

Are there any recent GIS data displaying such changes? -Search GIS database -Query other public sector database -Coordinate with the National GIS center Questions to be asked before acquiring new satellite imagery YesNo

Is Ground survey a valid alternative for data acquisition? -Is area easily accessible -How large is the area -Is there enough time for ground survey -Are there reliable surveyors to conduct the survey Questions to be asked before acquiring new satellite imagery Yes No

Questions to be asked before acquiring new satellite imagery Is Ground Survey more economical? - Compare cost of satellite images and ground survey YesNo

Satellite Imagery Acquisition is the Right Decision