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I am conducting a habitat suitability analysis using ArcGIS desktop 10.2.2.

I have a vector .shp of a number of georeferenced hare sightings across Ireland, however when I load the layer on to my map, the map will only show my existing layers (island of ireland, approx 1:2,000,000 WGS 1984), or alternatively I can 'zoom to layer' on my new vector, which causes the other layers to disappear but the new polygons to correctly draw, at a scale of something absurdly high, around 1:500,000,000,000.

I have tampered with the 'scale' function to rescale the polygons, but it only seems to make the scale get even larger.

I have toyed with various projections too, but to no avail.

Anyone have any ideas how to reconcile these two?

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closed as unclear what you're asking by PolyGeo Oct 8 '18 at 9:47

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    Seems like you may have them in a different coordinate reference system or projection than your original data. If you can provide the info for both data sets we may be able to help troubleshoot further (what datum, projection, etc found by looking at layer properties). support.esri.com/en/technical-article/000006790 – GISKid Jul 8 '18 at 17:44
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    Based on the coordinates reported by the status bar, it looks like that layer could be in British National Grid (EPSG:27700). Try redefining it with the Define Projection Tool or the layer's property page in ArcCatalog. – mkennedy Jul 8 '18 at 20:35
  • I think this may be a duplicate of gis.stackexchange.com/questions/20572/… – PolyGeo Jul 8 '18 at 23:05
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    My fault; I missed the Ireland comment. Try either 29902 (TM65 grid) or 29903 (TM75 grid). That puts the data in/near NI. Set a transformation too! – mkennedy Jul 9 '18 at 16:21
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    @Chris Just this problematic layer. But in ArcMap, open the data frame properties, select coordinate system tab and click the Transformations button. Select TM65 or TM75 (whichever one you use) in the top box, and set the first transformation in the pull-down list. – mkennedy Jul 9 '18 at 19:05