Questions tagged [africa]
For questions which are specific to the region/continent of Africa.
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LANDSAT 7 Surface Reflectance Not Correctly Calculating GCI for Large Swaths of Area
I am attempting to calculate the Green Chlorophyll Index across districts in Mali between 2010 and 2019. I use Landsat 8 Surface Reflectance data for 2013-2019(since LANDSAT 8 began in 2013) and I use ...
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GCI and NDVI Uncorrelated in Same Region and Time Period
I am attempting to calculate NDVI and GCI values during the 2019 growing season within districts in Mali. Specifically, I want to take the max of NDVI/GCI values for each pixel over the growing season ...
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Counting number of distinct areas in cell using QGIS
On the figure below, I have:
a shapefile of cells of 0.5x0.5 degrees around the African continent
a shapefile of different regions in Africa
I would like to count the number of separate regions ...
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Does GADM have level 2 population data availability for African countries
I was wondering if GADM have level 2 population data availability for African countries (as many years as possible)?
If not, would anyone know other resources that may have?
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3
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Joining attributes in CSV by location using QGIS
I have a shapefile which divides Africa in cells of 0.5x0.5 decimal degrees. This documents provides the longitude, latitude of the centroid of the cell and a unique identified of each cell.
On the ...
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Cannot upload created shapefile
I cannot upload my Africa shapefiles that I created in QGIS (where I dissolved all internal boundaries), why?
I get this error when I run my code with some Africa shapefiles (which are not dissolved) &...
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351
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Generating grid that matches Google Earth Engine polygons
I'm trying to create a grid in R over the whole continent of Africa (I received some help in this GIS StackExchange post), but I'm having trouble generating a grid that matches the CRS used in the ...
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Adequate CRS when creating a grid over a whole continent in R
I'm trying to generate a grid of 6.72 km by 6.72 km points over the whole continent of Africa, but I'm having a lot of trouble in doing so.
I'm mainly running into 2 problems:
My first issue arises ...
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Choosing Projected CRS for Uganda
I'm curious to know what the correct projected CRS for Uganda is and if there is a national grid?
Is it ok to use UTM as it is conformal?
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Choosing appropriate projected coordinate system for Africa
I am using the NNjoin tool to compute the distance between points and a multilinestring. Both layers are in CRS 4326 and cover most of Africa.
I've understood that I need to reproject my layers to a ...
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Exclusive Economic Zone (EEZ) and Regular Boundaries one shapefile
Does anyone have an idea if there is a shapefile of the merged EEZ boundaries and regular administrative boundaries? I need this data for entire Africa. I have downloaded the EEZ boundaries from http:/...
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Extracting Sub-National admin boundaries or regions from GRUMPv1 or GPW v4
GRUMP and Gridded Population of the World (GPW), v4 provides population and demographic values for sub-national levels. However, I am unable to extract the polygons or boundaries from their datasets. ...
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157
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Seeking accurate WMS server for Kenya?
I am looking for an accurate Map for visualizing positional data collected in Kenya. Right now I am using EXOMAPS (https://tiles.maps.eox.at/wms), in particular, a Sentinel2 cloudless view, but I am ...
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Large Scale Watershed Delineation
Using QGIS,I attempted Africa's watershed delineation taking the following steps:
Downloaded DEM from earthexplorer USGS (GTOPO30)
Created a mosaic of the downloaded DEM
Reprojected the mosaic ...
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Number of Eastern Africa countries [closed]
Are Rwanda and Burundi part of "Eastern Africa countries" or "East African countries". Some sources are differing.
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One shapefile for African continent containing counties/regions?
I use R to do my geo stuff with two limitations. First, I'm pretty new to all the geo stuff, and second I got lost while searching for a shapefile. I'm looking for a shapefile that contains all the ...
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Crop a raster file in R
I have a UN-Adjusted Population Count dataset, for the year 2015, stored in a TIFF file format (~450MB) downloaded from http://sedac.ciesin.columbia.edu/data/collection/gpw-v4/sets/browse
In R I am ...
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Africover data, where is it now located? [closed]
Africover geographic data used to be at http://www.africover.org. It is no longer here. Where is the Africover data now located?
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Looking for Historical wind data (direction/speed) for E. Africa or greater
Does anybody know of a source for wind data ~04 - 14 for E. Africa or a larger area. I have looked at a number of sources but have not found anything for these consecutive years.
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Defining the correct AEA proj4string for FEWSnet Rainfall Data (Southern Africa) in R [closed]
I have some general questions about how to go about solving this problem:
I am trying to incorporate FEWSnet's monthly Rainfall Estimate data from 2014-2015 for Southern Africa into an analysis where ...
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Seeking free vector data on paved roads in Africa? [closed]
I have recently come across vector road data from the Africa Infrastructure Knowledge Program (http://www.infrastructureafrica.org/documents/list/roads). I found these data helpful for three reasons:
...
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Topographical Elevations for Central Africa and Cameroon
I am using QGIS and I have been faced with the problem of topographical maps. From searching online I could only find data for the United States. Google maps offers elevation contours, however I am ...
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Administrative level GeoJSON Polygons for African Countries
I'm very new to GIS and I have spent the last few days trying to find some kind of database with the aforementioned polygons with no luck. The purpose is simply to label a location at district level ...
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Seeking shapefile of administrative divisions of Cote d'Ivoire (Ivory Coast) post-2011
I've been trying to find a shapefile containing CIV's administrative divisions (preferably down to the level of sous-prefecture) reflecting the national reorganization of 2011 but have had no luck. ...
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Satellite imagery alternatives for land use/cover classifcation
Apart from Landsat imagery, which other satellite imagery is good for land use / cover studies and can be obtained free of charge?
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Orthophoto Free Download?
I'm looking for Image datas for East Africa. Specifically for Rwanda. Does anyone know if such data are available at all free? My target is to digitize roads and buildings with the help of image datas....
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4
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690
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Calculate percentage of land cover within a buffer in meters, not decimal degrees
I am trying to calculated the percentage of land cover within a buffer area (3000m) around my coordinates. My output is in decimal degrees but I want it in meters or at least that I can calculate the ...
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Temperature data for Africa
Where can I find daily minimum / maximum temperature for Africa, possibly in a raster format?
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Are there publicly available run-off data for Africa?
I was wondering if there are good publicly available dataset for surface run-off (water)?
I have a rough idea that surface run-off should be some function of rain-fall and soil infiltration/...
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Is there hydrologically correct water-course data for Africa
I was wondering if there are any hydrologically correct river-channel data available for download for Africa?
By hydrologically correct, I mean
the topology should be correct. Connected river ...
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Lake Victoria bathymetric data
I am trying to find bathymetry for Lake Victoria (or portions thereof).
Any GIS format and almost any resolution will do.
As a last resort a hydrographic chart will suffice.
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Seeking shapefiles for global border crossings?
I am trying to find a shapefile or set of shapefiles that contain global border crossings. Basically, what are the points of transit between one country and another.
Does anyone know if this data is ...
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Data about administrative subdivisions capital cities
I am looking for data about second or third rank administrative capitals in every African country (the administrative centre of a country territorial subdivision), but I can't find anything close to ...
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Looking for a wind WMS for Europe and Africa
I was looking for a wind WMS but couldn't find. I wanted a wind WMS for Europe and Africa. Does anyone know about any?
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