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Issues viewing data in land use maps - help!

Question asked by Alli_Apples on Jan 9, 2018
Latest reply on Jan 12, 2018 by kenbuja

Hi everyone. Hope I am posting in the right place. I am currently creating a set of land use maps and I am having an issue that I haven't experienced before. I am fairly competent but not amazing on ArcGIS and I've only been using the software for about a year. So I'm desperately hoping that this is an easy issue to fix and I've just missed something basic.

 

The issue: I am busy creating a set of land-use maps for the greater Johannesburg area in South Africa. I have three shapefiles. The years are 1990, 2000 and 2013. The major issue is that only some of the data is displaying on the 2013 file, despite all being in the attribute table.

 

Hoping the images can give you a better idea. They are all taken on the same scale and site, with only the layers being turned on one by one.

 

If you look at the first image below, the green displays all the data available for 1990. In the next image, I have turned on the 2000 layer. As is expected, the pink covers all of the green, because we have more data in 2000. Then the issue comes when I turn on the 2013 layer. You'll see that there is still a lot of pink that is not covered by blue, which should not be the case, since all the 2000 areas have also been covered in 2013. If you look at the attribute tables, I am right. The 1990 attribute table has 44606 records; 2000 has 52258 records and 2013 has 56467 records. 

 

1990 data2000 data2013 data

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