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Re: How to use GPS data [message #22498 is a reply to message #22449]

Sat, 20 March 2021 05:06

hamid
Messages: 9
Registered: November 2018

Member

Dear Jennie,

1. The surveys you are working with are not panel, but cross-sectional, meaning that different individuals were surveyed in each round. You cannot merge the two years to run longitudinal models at the household/individual level (e.g., Fixed Effects regressions).

2. Merging the two surveys to obtain a regional-level panel dataset is usually possible if you have GPS coordinates in both.

I would proceed as follows:
- download a shapefile for the correct administrative level of Uganda;
- generate a dataset with only the DHS individual/household identifiers plus latitude and longitude and create a spatial point dataset
- assign to your spatial point data the same coordinate reference system of the shapefile (i.e., account for earth curvature).
- project the points from your surveys onto the shapefile (spatial polygon data): this will result into a spatial point dataset with a data slot in which you have hh/ind ids and the regional identifier
- merge the spatial point data-slot to the original DHS surveys using hh/ind ids
- consider that if the coordinates provided by DHS have been randomly offset, a small degree of error will apply, but this would be random and thus it only would translate in some degree of attenuation bias (not systematic).

I hope this helps.

Best,
Hamid

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[Message index]

		How to use GPS data By: Jennie on Sat, 13 March 2021 11:49
		Re: How to use GPS data By: hamid on Sat, 20 March 2021 05:06
		Re: How to use GPS data By: Jennie on Sun, 21 March 2021 06:25
		Re: How to use GPS data By: lucasj_lm on Wed, 31 March 2021 20:07
		Re: How to use GPS data By: Jennie on Fri, 02 April 2021 08:53
		Re: How to use GPS data By: lucasj_lm on Sat, 03 April 2021 22:35
		Re: How to use GPS data By: Jennie on Tue, 06 April 2021 02:28

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