GeoTiff float (Digitales Höhenmodell Oberfläche NRW)

[pfefferCode]

Hi!

The problem occurs using tiffs like this: https://www.wcs.nrw.de/geobasis/wcs_nw_dom?REQUEST=GetCoverage&SERVICE=WCS&VERSION=2.0.1&COVERAGEID=nw_dom&FORMAT=image/tiff&SUBSET=x(356000,357000)&SUBSET=y(5699000,5700000)&OUTFILE=dom1_32_356_5699_1_nw_2020&APP=timonline

(hint you can pick your own .tiff by: this URL: https://www.tim-online.nrw.de/tim-online2/?bg=basemapDE_grau&scale=1400000&center=450000,5700000&wms=https://www.wms.nrw.de/geobasis/wms_nw_dhm-uebersicht,nw_dhm_metadaten&opacity=70&legend=true (klick on "download" an choose "Höhenmodelle" --> "Digitales Oberflächenmodell" --> "weiter" --> "*.tiff" --> "weiter" --> select one --> "weiter"....)

I tried it on http://app.geotiff.io/

There are two issues that might be connected:

1. Loading the .tif file is working always only at the second try. After the first try the area is marked all in the same gray. After the second loading of the image, correct grey values are shown.
2. Identifying values on http://app.geotiff.io/ does not give a result. In the JavaScript console appears the following error:

bundle.js:35 Uncaught TypeError: Cannot read properties of null (reading 'then')
    at r.<anonymous> (bundle.js:35:1059117)
    at r.fire (bundle.js:92:5274)
    at r._fireDOMEvent (bundle.js:92:43297)
    at r._handleDOMEvent (bundle.js:92:42540)
    at HTMLDivElement.a (bundle.js:92:22968)
    at r.<anonymous> (bundle.js:35:1059117)
    at r.fire (bundle.js:92:5274)
    at r._fireDOMEvent (bundle.js:92:43297)
    at r._handleDOMEvent (bundle.js:92:42540)
    at HTMLDivElement.a (bundle.js:92:22968)
(anonymous) @ bundle.js:35
fire @ bundle.js:92
_fireDOMEvent @ bundle.js:92
_handleDOMEvent @ bundle.js:92
a @ bundle.js:92
(anonymous) @ bundle.js:35
fire @ bundle.js:92
_fireDOMEvent @ bundle.js:92
_handleDOMEvent @ bundle.js:92
a @ bundle.js:92

Thank you for your work! PfefferCode.

PS: I first reported it here: https://github.com/geotiffjs/geotiff.js/issues/419 but I was told, here is the correct place.

[DanielJDufour]

This should be fixed with https://github.com/GeoTIFF/geotiff.io/commit/dcf846e0a1ac6b090dc258b24234ca29aef7678c#diff-094f1c9b3122487b86e34893f4c4138beeb0af18744c773aac10e4cc30c3c55e.

Lemme know if it works for you!

[DanielJDufour]

Also, would you be interested in submitting this file to https://github.com/geotiff/test-data ? I don't think we have other test files in the EPSG:25832 projection. We'll also be able to use it to test the visualization once it's added.

[pfefferCode]

@DanielJDufour Thanx for answering and provoding a fix so fast! How can I test if it works? (When) will it be included in http://app.geotiff.io/ ?

Please feel free to add the .tif to the test data.

[DanielJDufour]

It should be included in app.geotiff.io right now :-)

Note: the identify function should be working, but the visualization is a work in progress.

[pfefferCode]

@DanielJDufour Thanx! identifying works now :-) Showing the values as different grey tones still work only on the second load of the same image. All other functions (Mean, Sum, Mode, Median, Histogram - did not test Band arithmetic and Raster calculator) do not work.

[DanielJDufour]

Okay. I'll fix the other stats now. Thanks for testing!

[DanielJDufour]

Mean, Min, Max, Sum, Mode, and Median should all be fixed now. Will have to look into Histogram, Band Arithmetic, and Raster Calculator.

[pfefferCode]

tested: mean, min, max, sum, mode an median as rectangle and polygon: all deliver plausible values. Thank you. Histogram does not work till now.