'Dual independent map encoding' presentation slideshows

Welcome to Address Databases

1.83k views • 127 slides

GIS Data and Data Sources DEM, TIGER, DLG, LULC, Soils, DOQQ, DRG

GIS Data and Data Sources DEM, TIGER, DLG, LULC, Soils, DOQQ, DRG. 1. Digital Elevation Models (DEM). The elevation value are stored as a matrix of regularly spaced ground positions Each data point represents the elevation of the grid cell in which it is located. 1. DEM 1:24,000 .

1.05k views • 47 slides

History of GIS

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Winter 2011 GIS Institute

Winter 2011 GIS Institute. Space: Questions & Tools. Space: Questions. Questions can range from basic to complex : How does a variable or phenomenon vary over space? (Can be answered with a map)

445 views • 33 slides

Introduction

Introduction. Last day we looked at spatial data structures for both raster and vector models. Today we will look at how this data is managed. In the past it was organised into files; today we are more like to use a database management system.

370 views • 23 slides

ABCD-GIS and ABCD-WWW combined meeting Survey of Web Mapping Projects

ABCD-GIS and ABCD-WWW combined meeting Survey of Web Mapping Projects. January 19 th , 2011. ABCD-GIS and ABCD-WWW combined meeting Survey of Web Mapping Projects. Part 1 of 8: Introduction to GIS Desktop vs. Web mapping Wendy Guan, CGA wguan@cga.harvard.edu. Wendy Guan Jan.19, 2011.

372 views • 22 slides