nav[aria-label="Primary Navigation"] { padding: 0; & ul { list-style: none; width: 100%; display: flex; flex-direction: row; justify-content: start; align-items: start; gap: 30px; padding: 0; & li { margin: 0; } & ul li { list-style: none; } } }

How images are inserted with correct georeferencing while they have no auxiliary files,

JamalNUMAN

I observed that images are inserted with correct georeferencing while they have no auxiliary files.

I was assuming that there should be some uxiliary files in order to get images placed in their correct positions

Vind meer berichten getagd met

Accepted answers

JakeSkinner

Hey Jamal,

TIF files can have an internal header that will store the coordinate and projection information.

All comments

JakeSkinner

Hey Jamal,

TIF files can have an internal header that will store the coordinate and projection information.

JamalNUMAN

Thanks Jake.

If this is possible for tif format, then why georeferencing an image with tif type still needs auxiliary files in order to get placed in the correct position?

DanPatterson_Retired

You missed Jake's point... they "can" have their georeferencing builtin, but some don't, hence your aux files

TIFF files are the best choice for importing into image editing applications and are also a common GIS raster data format. However, they cannot be natively viewed by a web browser. TIFFs also support georeferencing information in GeoTIFF tags or in a separate world file for use as raster data.

some options when exporting them

Write world file	In the same location as the exported map, generate a separate world file that contains georeference information. This allows the exported image to be used as raster data in ArcGIS Pro or other GIS applications.
Write GeoTIFF tags	Add GeoTIFF information directly to the TIF header. This allows the exported image to be used as raster data in ArcGIS Pro or other GIS applications.

There are many other links in the help regarding tiffs depending where they are coming from or how they got there (eg las data) and whether you want to use them as raster data sources etc

JamalNUMAN

Not sure, Dan, where can I find an option to get the tif files georeferenced without the need of auxiliary files while exporting!

JamalNUMAN

The “Export Raster World File” tool can create world files for the tif tiles and then these tif tiles can be shifted based on a code from python script

---------

import os
import arcpy
import string

Folder_Path = arcpy.GetParameterAsText(0)

for file in os.listdir(Folder_Path):
if file.endswith(".tfw"):
print(os.path.join(Folder_Path, file))
with open(os.path.join(Folder_Path, file), 'r') as f:
lines = f.readlines()
f.close()

before_last_line = lines[-2]
before_last_line2 = float(before_last_line) - 50000
last_line = lines[-1]
last_line2 = float(last_line) - 500000
lines[-2] = before_last_line2
lines[-1] = last_line2
num_lines = sum(1 for line in open(os.path.join(Folder_Path, file)))
print (num_lines)

for x in range(num_lines):
print( lines[x])

with open( os.path.join(Folder_Path, file),'w') as o :
for x in range(num_lines):
o.write(str(lines[x]) +'\n')
o.close()

for file in os.listdir(Folder_Path):
if file.endswith(".tif"):
print(os.path.join(Folder_Path, file))
arcpy.DefineProjection_management(in_dataset=os.path.join(Folder_Path, file), coor_system="PROJCS['Palestine_1923_Palestine_Grid',GEOGCS['GCS_Palestine_1923',DATUM['D_Palestine_1923',SPHEROID['Clarke_1880_Benoit',6378300.789,293.4663155389802]],PRIMEM['Greenwich',0.0],UNIT['Degree',0.0174532925199433]],PROJECTION['Cassini'],PARAMETER['False_Easting',170251.555],PARAMETER['False_Northing',126867.909],PARAMETER['Central_Meridian',35.21208055555556],PARAMETER['Scale_Factor',1.0],PARAMETER['Latitude_Of_Origin',31.73409694444445],UNIT['Meter',1.0]]")

------------------------

Doe mee aan het gesprek

Aangemelde leden kunnen berichten plaatsen, updates volgen en meer. Nieuw hier? Registreer een gratis account.

Snelle Links

Community Help
Find useful guides, FAQs, and documents to help you navigate and make the most of Esri Community.