Search found 7 matches

by dartcom
Fri Nov 02, 2018 8:45 am
Forum: Bug Reports
Topic: Problems with projected GeoTIFF files
Replies: 9
Views: 2932

Re: Problems with projected GeoTIFF files

Thanks Ghansham, there's no hurry. Will await news in due course.

Chris
by dartcom
Wed Oct 31, 2018 5:24 pm
Forum: Bug Reports
Topic: Problems with projected GeoTIFF files
Replies: 9
Views: 2932

Re: Problems with projected GeoTIFF files

Many thanks Ghansham, if you can give me a link to download the plugin I'll give it a try.

Chris
by dartcom
Wed Oct 31, 2018 10:19 am
Forum: Bug Reports
Topic: Problems with projected GeoTIFF files
Replies: 9
Views: 2932

Re: Problems with projected GeoTIFF files

Thanks for your replies Barry and Ghansham. A sample GeoTIFF file containing channel 4 of an AHRPT image transformed to a Stereographic projection can be downloaded from here: m And this is what it looks like when loaded into Global Mapper: DartcomGeoTIFFPreview.png I've also uploaded the following ...
by dartcom
Tue Oct 30, 2018 12:18 pm
Forum: Bug Reports
Topic: Problems with projected GeoTIFF files
Replies: 9
Views: 2932

Problems with projected GeoTIFF files

Hi, we're having a problem with GeoTIFF files which have the Model Type tag set to Projected (1). The problem is that in the Field Selector tab of the Data Explorer in McIDAS-V (1.7u1), the only Display option shown is Omni Control - the normal Image Display options aren't shown. GeoTIFF files with ...
by dartcom
Tue Oct 23, 2018 1:27 pm
Forum: General Questions
Topic: Logarithmic color tables
Replies: 4
Views: 1728

Re: Logarithmic color tables

Further to my earlier reply, I ended up using Excel to generate a color table containing 270,977 entries. I spread out the colors in it to produce a pseudo-logarithmic scale and saved it as a text file, then imported it into McIDAS-V as a color table. It works perfectly, producing the correct colors...
by dartcom
Tue Oct 23, 2018 8:35 am
Forum: General Questions
Topic: Logarithmic color tables
Replies: 4
Views: 1728

Re: Logarithmic color tables

Hi Bob, thanks for getting back to me. I wasn't aware of the setToMissing function, so I've added it to all our formula functions so zero values (which are fill data anyway) are set to NaN. This has resolved a problem I had where the fill data was being colored using the minimum value in the color t...
by dartcom
Mon Oct 22, 2018 11:41 am
Forum: General Questions
Topic: Logarithmic color tables
Replies: 4
Views: 1728

Logarithmic color tables

We have some MODIS and VIIRS Chlorophyll-a products in GeoTIFF format generated by the NASA DRL IPOPP software. We've created a formula to convert the 0-255 values in the GeoTIFF files to mg^m-3 values in the range 0.01 to 100. However the scale is logarithmic rather than linear, so applying the sta...