We are downloaded map.mbtiles from openmaptiles.com.
Now we are tyring to convert that map.mbtiles to png images.
We tried mbutil to convert but images we got those are not supported.
We need method or process to convert it.
The easiest way would be using the Tileserver-GL to render png raster tiles from your mbtiles. Documentation is avaible here: https://tileserver.readthedocs.io/en/latest/
Related
Is there a way to download only jpg or png or another specific format images using bing-image-downloader in python?
This is the documented code for using bing-image-downloader...
downloader.download(query_string, limit=100, output_dir='dataset', adult_filter_off=True, force_replace=False, timeout=60, verbose=True)
Is there something that can be added to this to, let's say, only download .jpg images from the web?
I read my hyperspectral (.raw) file and combine three bands to "gai_out_r" Then I output as following:
writeRaster(gai_out_r,filepath,format="GTiff")
finally I got gai_out_r.tif
But, why Win10 can't display this small tif as the pic that I output the same way from envi--save image as--tif
Two tiffs are displayed by Win10 as following:
Default windows image viewing applications doesn't support Hyperspectral Images-since you are just reading and combining 3 bands from your .raw file, the resulting image will be a hyperspectral image.You need to have separate dedicated softwares to view hypercubes or can view it using spectral-python also.
In sPy, using envi.save_image , will save it as a ENVI type file only. To save it as an rgb image file(readable in windows OS) we need to use other methods.
You are using writeRaster to write to a GTiff (GeoTiff) format file. To write to a standard tif file you can use the tiff method. With writeRaster you could also write to a PNG instead
writeRaster(gai_out_r, "gai.png")
Cause of the issue:
I had a similar issue and recognised that the exported .tif files had a different bit depth than .tif images I could open. The images could not be displayed using common applications, although they were not broken and I could open them in R or QGIS. Hence, the values were coded in a way Windows would not expect.
When you type ?writeRaster() you will find that there are various options when it comes to saving a .tif (or other format) using the raster::writeRaster() function. Click on the links therein to get to the dataType {raster} help site and you'll find there are various integer types to choose from.
Solution (write a Windows-readable GeoTIFF):
I set the following options to make the resulting .tif file readable (note the datatype option):
writeRaster(raster, filename = "/path/to/your/output.tif",
format = "GTiff", datatype = "INT1U")
Note:
I realised your post is from 2 and a half years ago... Anyways, may this answer help others who encounter this problem.
I am looking for a way to convert tif files into pdf or image format with multiple files using plsql. What I need to achieve is displaying converted pdf (or other format) with multiple pages from tif file and show it in browser.
What I did so far was to convert from tif to png but since png it's single file it's not what i'm looking for .
ordsys.ordimage.process(dest_loc, 'fileFormat=PNG');
ordsys.ordimage.getproperties(dest_loc, v_clob);
Chrome and Firefox doesn't support TIFF format anymore.
Or any other idea it's great. Thank you!
I'm trying to to convert aspx pages to PDF.
The two main issues I've encountered are:
Some of those pages contains gis elements (mostly google maps, but some may be municipal maps). When the user changes their position - I want it to be converted properly. Right now I couldn't event convert their default position to pdf.
The text is in Hebrew and I'm having hard time converting it.
I've tried using jsPDF - used their addHTML function and looked at their runner example (which is using iframe - but doesn't seem to work on explorer, or with maps)
Does anyone have any other idea as to how I can convert this? Maybe convert the page to jpeg and then to convert it?
If you have working samples - that would be excellent.
You can try using IECapt (http://iecapt.sourceforge.net/) to convert it to JPEG and then convert it from JPEG to PDF.
for example:
IECapt --url=http://www.page_you_want_to_render.org/ --out=the_render.jpeg
I want to read an Jpeg image in R. Transform it into greyscale and finally to get the Negative of the image.
I used to read the image with biOps and then make the other two transformations with EBImage.
Currently I am working with windows 8 and I cannot make this simple actions anymore, due to version issues I think.
I would like to install the correct packages or to find some other way to do this three simple steps.
Thank u!
Why are you trying to read the file in with biOps? (which is no longer available on CRAN)
#Read the file in with `EBImage`
library("EBImage")
your_image = readImage(system.file("directory", "your_image.jpg", package="EBImage"))
#perform your other transformations