6. Central Police Division 7. Kayole Police Division 8. Buruburu Police Division 9. Kasarani Police Division 3.2 Data Collection 3.2.1 Data Identification Process This refers to the identification, collection, digitization and correction of errors for the necessary data used to build GIS databases. It is the most expensive and critical phase for the success of any GIS project. Both primary and secondary geographic data may be obtained in digital or analog format. Analog data for example the crime incidences recorded at the police station for this case required to be entered in computer spreadsheets. Analog maps were scanned and then imported to ArcGIS as geographic database. Before importing into GIS environment considerable formatting and restructuring may be required. The datasets required for this particular study were collected and their sources identified as follows. Table1: Datasets and their sources DATASETS DATA DESCRIPTION DATA SOURCE Topographic Maps and Kenya admin. Maps at Survey of Kenya(SOK) Administrative Maps scale1:50000 and Nairobi JICA, Japanese International topomaps at scales 1:5000 Corporation Agency and 1:20000 Crime Incidence and Reports Crime incidences and reports Nairobi Central Police Division.
6. Central Police Division 7. Kayole Police Division 8. Buruburu Police Division 9. Kasarani Police Division 3.2 Data Collection 3.2.1 Data Identification Process This refers to the identification, collection, digitization and correction of errors for the necessary data used to build GIS databases. It is the most expensive and critical phase for the success of any GIS project. Both primary and secondary geographic data may be obtained in digital or analog format. Analog data for example the crime incidences recorded at the police station for this case required to be entered in computer spreadsheets. Analog maps were scanned and then imported to ArcGIS as geographic database. Before importing into GIS environment considerable formatting and restructuring may be required. The datasets required for this particular study were collected and their sources identified as follows. Table1: Datasets and their sources DATASETS DATA DESCRIPTION DATA SOURCE Topographic Maps and Administrative Maps Kenya admin. Maps at scale1:50000 and Nairobi topomaps at scales 1:5000 and 1:20000 Survey of Kenya(SOK) JICA, Japanese International Corporation Agency Crime Incidence and Reports Crime incidences and reports Nairobi Central Police Division.
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