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Partner
Partner

QlikView Qlik GeoAnalytics "Max no. of object"

Hi,

I have loaded a shapefile with 50k of polygones.

When I want to display more that 1k of polygone (for example Max no. of object = 5000) on one map, my QlikView crash :s

Have you a same issue ?

Aurélien

1 Solution

Accepted Solutions
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Employee
Employee

Hello  Aurélien,

Yes, depending on the amount of memory in your computer, the number of polygons might be too big to be shown in a single view.

I suggest you to use a hierarchy, start with bigger polygons and then drilldown to more detail (for example going from State to County Level).

Best Regards,

Ana Yakushi

Qlik GeoAnalytics

View solution in original post

10 Replies
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Employee
Employee

Hello  Aurélien,

Yes, depending on the amount of memory in your computer, the number of polygons might be too big to be shown in a single view.

I suggest you to use a hierarchy, start with bigger polygons and then drilldown to more detail (for example going from State to County Level).

Best Regards,

Ana Yakushi

Qlik GeoAnalytics

View solution in original post

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Partner
Partner

Hi,

Ok thx

Aurélien

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Creator
Creator

Hi Aurelien,

I also encounter same issue when trying to show more than 1k polygons, qlikview just crashs. The issue has not fixed yet ?  If we use Geoanalytics sever version, can we fix the crash issue when showing more than 1k polygons in qlikview?

Thanks, .

Wallace

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Employee
Employee

Hi Wallace,

How complex are the polygons, how many points per polygon?

Consider using "Simplify", I often switch between different representations, showing a lower resolution when showing all polygons and then switching to high res when showing less than for instance 100 polygons. Use calculation conditions and two sep layers.

Thanks,

Patric

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Creator
Creator

Hi Patric,

There are quite a few areas on the map and the design is for example to show all polygons under area A  after zoom in area A. The problem is no matter under which area it is for sure thousands of polygons. ( thousands of rows). But qlikview will crash when we are trying to display polygons around > 1k. So I am thinking the solution may publish the app to qlikview server with geoanalytis sever on-premise.  Since we go to a browser to open the app on-premise server. Probably in this manner, the app will not crash when displaying > 1 K polygons ?  May I have your feedback on this ? thanks ,

Wallace

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Employee
Employee

Hi Wallace,

On-premise server won't be that important, the key is do moderate the resolution for the usage. I would try different approaches, using simplify, switching between resolution, using points instead of areas in overview etc etc. We are looking into the problem of very large polygons in QV it should work slower but not crash.

Thanks,

Patric

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Creator
Creator

Hello,

I have a shapefile with 4000 polygons. Each polygon has a value so the dataset has two columns. Value and Geometry.

There is no polygon ID. When importing, a field _autoIndex_ is created.

These polygons have 5 coordinates each so simplify actually makes them more complicated (which is kind of ironic).

I wanted to use Binning but Binning only takes points. What would you suggest I do since i don't have my own hierarchy for these polygons, just a long list.

Best regards,

Marcelo

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Employee
Employee

Add this before the load to get a polygon center, can be used for the next binning or spatialindex point.

load  *, GeoGetPolygonCenter(Geometry) as pt;

Thanks,

Patric

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Creator
Creator

Hi @Patric_Nordstrom , I have one question does  GeoGetPolygonCenter(Shape)  work in qlikview?

Thanks,

Matsa