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| Titel: |
Remote sensing techniques for population estimation of colonias in the lower Rio Grande Valley of Texas |
| Auteur: |
Holz, Robert K. Davies, C. Shane |
| Verschenen in: |
Geocarto international |
| Paginering: | Jaargang 7 (1992) nr. 2 pagina's 21-32 |
| Jaar: |
1992-06 |
| Inhoud: |
Colonias are rural, “squatter-like” settlements of mostly substandard housing that develop along the U.S. border with Mexico. In Texas there are two major concentrations of colonias; one near El Paso in west Texas and the second along the Lower Rio Grande Valley, from McAllen to Brownsville in South Texas. This study develops remote sensing techniques for estimating the population of colonias in the Lower Rio Grande Valley. The house count method is used in this study as it works best on small settlements and housing clustered on the rural landscape, places for which it is often difficult to gather accurate population data.The technique employs relatively large scale air photographs of individual colonias as a base for counting dwelling units. The number of dwelling units is then multiplied by the average number of residents per dwelling unit to provide an estimated total population for the colonia. The average number of residents per dwelling unit was determined by field interviews. The technique provides population estimate accuracies of ±3.5 percent without the aid of field data and accuracies of ±1.5-2.5 percent with field data. The total population of the 421 colonias in the Lower Rio Grande Valley of Texas was estimated at 72,819 as a low value and 74,336 as a high value. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 193 van 250 gevonden artikelen
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