Tagged Questions

"Convert" usually tags questions where a change of physical file format or of coordinate representation is needed.

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5
votes
5answers
4k views

How to georeference a dxf?

I have got myself a dxf which is built with units in the wrong scale. How do I upscale that in QGIS? Note it does open in QGIS, just in the wrong map units and location.
4
votes
2answers
538 views

Is it possible to generate a vector polygon from a polygon on a raster image?

I have a raster map which I have extracted from a government report providing flood extent return frequencies. I want to 'snatch' these flood extent polygons (i.e. convert to vector) and I was ...
0
votes
1answer
239 views

Plotting Smith and Sandwell global seafloor topography grids

Does anybody have any experience with plotting Smith & Sandwell 2-minute Mercator-projected grids in ArcGIS? I've downloaded one in two formats: ers and img. I've found tools for processing .img ...
1
vote
2answers
4k views

Converting TAB to MIF / MIF to TAB

How I can export (import) data from TAB format to MIF and vice versa?
3
votes
2answers
966 views

IDRISI .vec file translator to ESRI shapefile format?

I've recently got hold of almost 20 years old IDRISI .vec files which I'd like to convert to ESRI shapefile. I've been struggling to find any translator for this file format so far. Does anybody know ...
8
votes
3answers
1k views

How to combine corner-touching polygons into a single feature

I have created a polygon layer from rasters, and only have a single classification ID (and calculated acres) for each polygon. I would like to "dissolve" all touching features into larger, individual ...
2
votes
1answer
206 views

clipped data not going into the folder

I created a model in python that clips and converts different data sets into DWG based on the the grid number. I will like the DWG data (Output) to go into the folder I created as part of the ...
2
votes
1answer
449 views

Convert point XY to page units XY using arcpy?

I am using arcpy to export PDFs from my ArcGIS Server application. I want to move a TextElement in my layout view to the centroid of a selected feature. I can get the centroid of the feature, but ...
0
votes
1answer
3k views

How can I convert SRTM data to DEM or DTED?

i am working on a project which is not commercial and i need some digital elevation data for visualization. in net i have found a link and i have downloaded .asc data from following link.. SRTM Data ...
5
votes
2answers
2k views

ogr2ogr kml to shp conversion created 184 shapefiles?! What am I missing?

I'm trying to convert this KML dataset of ice arenas to a shapefile using ogr2ogr (GDAL 1.8). After some initial troubleshooting to get the script running, it's creating 184 different shapefiles (736 ...
3
votes
1answer
137 views

rgb2pct.py increases size of file 20 fold!

I wanted to reduce the number of bands of a tif file from 3 to 1... I used this command rgb2pct.py -n 256 fnp_braunschweig.tif fnp_bs.tif and it increased the size from 31mb to 778mb I actually ...
1
vote
3answers
895 views

Why does ArcGIS 10 Convert Time Field geoprocessing tool return <null> when using custom format?

I have dates in my attribute table that are stored as strings - they look like 02/22/2012 (mm/dd/yyyy) - and I would like to convert them to Date type. When I try to input a custom date format in the ...
2
votes
1answer
544 views

Looking for a pure Python method to convert Lat/Long To MGRS

Does anyone know of any packages out there that implement a pure python method to convert lat/long coordinates to MGRS coordinates? PyPi has a package, but it requires some c-extensions from ...
16
votes
2answers
5k views

How can I convert data in the form of lat, lon, value into a raster file using R?

I have a data set of values over a km grid in the continental U.S. The columns are "latitude", "longitude", and "observation", e.g.: "lat" "lon" "yield" 25.567 -120.347 3.6 25.832 ...
3
votes
1answer
516 views

turning multiple vector layers into one raster in arcgis 9.3.1

I want to make a raster out of the multitier view I have in ArcMap 9.3.1 . The layers in my ArcMap come from several datasets. I know there is a 'Feature to Raster' tool, but it converts one layer at ...
2
votes
3answers
7k views

Converting KML to layer in ArcGIS 10 - nothing happens

I have converted many KML files to layer in ArcGIS many times before without any problem. I just did a conversion (Arc Toolbox>Conversion tools> KML to layer) and the file is showing up in the table ...
2
votes
1answer
460 views

Underground Utility using Arcgis

Which software can I use for mapping of underground utilities? I am using GRED for marking of utilities & then transferring it to AutoCAD. Now I would like to load this AutoCAD file into a GIS. ...
2
votes
3answers
796 views

How to change DXF unit by Python 2.6

I have a bunch of DXF files to import into ArcGIS 10 but they are all in mm. However I need to change the unit to Meter and to do this I have to open AutoCAD to do it each time. Can anyone help to ...
1
vote
0answers
380 views

ADC Maps Grid to Lat/Long Coords Conversion

While the ADC site apparently has a paid conversion function, it's interactive, and I'm looking for some way to do so on a batch basis, possibly with an API. Any hope?
1
vote
2answers
2k views

How to get a slippy map from OziExplorer .map and .png tiles?

I have a bunch of topographic maps in the format of .map files and 4000x4000px png files.I would like to view them as a slippy map and be able to select an area and export that as one big image. I am ...
2
votes
1answer
735 views

Convert Features to Graphics

I want to convert selected features to graphics and keep the featuere symbology. I was thinking I could just call the UID command below, however it seems to not be working? Dim pUID As New UID ...
9
votes
2answers
456 views

What is the correct way to convert a USGS Orthoimage from WorldImage format to tiled GeoTiff for GeoServer?

USGS provides different resolution orthoimage quadrangles in the WorldImage format (*.tif with an accompanying *.tfw world file). Some of these quadrangles can be used by GeoServer (2.1.0 - 2.1.2) by ...
3
votes
0answers
86 views

Determine the Degree of Data Lossiness when Converting Data

I'm working through some of the ESRI tutorials on Data Interoperability and it briefly mentions the issue of data conversion being a lossy process. Some questions that come to mind are: What is ...
3
votes
2answers
887 views

ImageMagick's convert program changes PNG file format so that color/alpha info doesn't survive GDAL

It appears that ImageMagick's convert program changes something in my PNG file that causes GDAL processing to mess up the color and/or transparency bands. My original PNG file gets processed ...
5
votes
2answers
184 views

Vectorize cell boundaries in GRASS

I need to vectorize the cell boundaries of a raster map and I have forgotten how to do this. For instance, if I have a raster map of a region that is just map=1 with a cell size of 500m, I would ...
5
votes
1answer
7k views

How to batch convert Garmin GDB to GPX?

I need to convert a lot of garmin GDB files to GPX in order to convert it to another vector format. Is there any tools available can do a batch convert from garmin GDB files to GPX? Using MapSource ...
5
votes
3answers
1k views

How to convert orthophotomap to .ecw file?

I am looking for a method for convert orthophotomap (.adf files) to ERDAS .ecw file. Have you got any ideas ? Or maybe you have got any other idea how i can reduce a size of orthophotomap .adf ...
5
votes
3answers
8k views

Batch convert GeoTIFF's to KMZ files

I have about 600 GeoTIFF map files, each about 140 mb in size that I'd like to convert to KMZ files so people can download them and use them with Garmin GPS units, Google Earth, etc. Anyone know an ...
-1
votes
2answers
1k views

Projecting data from WGS84 to NAD27 UTM BLM Foot ArcMap

When I use the NAD27 BLM 15N prj from the projected>>UTM>>north america>> in ArcMap 10.0 and go from WGS84 to that..using the NAD_27_To_WGS_84_1 transformation..my resulting shapefile doesn't line up ...
0
votes
1answer
111 views

Programs to log NMEA on Nomad 900?

I am interested in logging NMEA data on a Trimble Nomad 900. Unfortunately the SatViewer records a maximum of 64,000 characters, too little for my application. I don't want to have to purchase ...
4
votes
2answers
179 views

Is there a simple way to detect what generation a MrSID file is?

I just found out there are a few types of MrSID files - generations MG2,MG3,MG4. As I have a user which uses Bentley Microstation V8 and apparently can see only some of the generations (and thus I ...
0
votes
1answer
577 views

How to convert dbf to raster the short way?

I have got a dbf file and i want make it to raster file but shor way, Look at my long way, 1- First i add my dbf file 2- and i create tin http://i1211.photobucket.com/albums/cc421/mtnkou/2.jpg 3- ...
2
votes
2answers
992 views

How to convert from GeoTIFF to PNG/JPG and Web Mercator in Java?

I'd like to convert raster image from (geo)tiff to an png/jpg and afterwards if it is necessary ... I'd like to convert the coordinates with help of EPSG-Codes to the OSM/Google Projection(EPSG: ...
2
votes
2answers
6k views

OpenLayers LatLon conversion

I have an OpenLayers map with a settings like a below. All LatLon points are represented like a POINT(3684182 5207957). In a more usual form (for me) it looks like a (104.287422, 52.284126). How can I ...
4
votes
3answers
2k views

Export georeferenced image overlay from KML?

How might one export image(s) from image overlays in a KML file to a standard geo-referenced raster format like geotiff? Use case: NASA's Earth Observatory has a time series of the changing Athabasca ...
4
votes
2answers
7k views

Using ArcMap, how may I convert a shapefile to use decimal degrees?

I have a shapefile that currently uses meters as the measure for its coordinate system, but the map framework I wish to use expects decimal degrees. I'd like to reproject my shapefile to use decimal ...
13
votes
2answers
2k views

How can I fix my complex Polygons so they show correctly in Google Maps?

Problem: I'm trying to find a way to fix some broken polygon shapes and I'm not sure how I can do this. Details: I've got a number of polygons which I basically imported from TIGERLINES a while ...
10
votes
4answers
1k views

Alternatives to ogr2ogr for loading large GeoJson file(s) to PostGIS

I have a 7GB GeoJson file that I would like to load into a PostGIS database. I have tried using ogr2ogr but it fails because the file is too big for ogr2ogr to load into memory and then process. ...
11
votes
3answers
1k views

ogr2ogr fails to convert GeoJson file > 200MB

As a followup to my previous question (Converting SimpleGeo Places GeoJSON file to shapefile), I am now struggling with what I perceive might be an ogr2ogr "memory" limitation, but I cannot be sure. ...
8
votes
2answers
13k views

Shapefile attributes to Autocad Annotation

How can I export the attribute information for the shapefile/feature class to Autocad Annotation/Text. I'm able to export the shapefile to autocad but unable to get the attributes in annotation. Need ...
2
votes
2answers
2k views

Converting ASCII grid/NTF to SRTM/DEM

I want to use the Ordnance Survey Land-Form Panorama product in some software called Maperitive, which can read custom SRTM DEM files. The data is provided in the following formats: DXF [Contours] ...
3
votes
1answer
152 views

What are some lightweight python modules to convert LAS data formats to text formats?

I searched on the net and found pyLAS, but it seems to require quite a few other modules and I couldn't get the install right. Any pointers will be much appreciated. Thanks!
6
votes
3answers
2k views

Convert PS/EPS/AI to shapefile?

Are there any programs which can convert from Postscript, Encapsulated Postscript, or Adobe Illustrator file formats to a shapefile? What about adding geo-referencing? I'm also open to recipes using ...
4
votes
4answers
4k views

Convert ESRI Integer ASCII Grid to something useful

How could I convert a file(s) which is "DIGITAL Map data stored in ESRI ARCInfo Integer ASCII Grid format" into something the rest of us can use? i.e import into QGIS. The main file has no extension ...
1
vote
1answer
375 views

Convert Lat/Lon to VicGrid94

In C# how can i convert a Lat/Lon coordinate to Vicgrid94 which is described http://spatialreference.org/ref/epsg/3111/ and also ...
4
votes
1answer
833 views

Dimensional analysis/conversion problem: Map scale to image resolution (dpi)

Given a map scale of 1:17,200 and a raster whose cell size is 6 inches, what resolution (dots per inch) should I choose when exporting the map to an image in order to maintain the raster's native ...
1
vote
0answers
89 views

What is the process of converting geodata in ArcMap 10 to WKT format? [duplicate]

Possible Duplicate: Shapefiles to Text What is the process of converting geodata in ArcMap 10 to WKT format? I am not a programmer so much, but will learn if needed. I have a set of ...
4
votes
4answers
1k views

Is there a way to convert 3D polylines to 3D points in ArcGIS?

I need to convert a huge number of very dense (densified to 1m) 3D polylines to 3D points. I need each vertex along the line and no duplicates (two of the same XYZ coordinates) if possible. Is there ...
13
votes
3answers
4k views

Converting SimpleGeo Places GeoJSON file to shapefile?

SimpleGeo has recently made their "Places" data set freely available which is GREAT, because now we can use it for our own purposes, even offline. So I went about downloading the 2GB dataset, which ...
3
votes
2answers
774 views

How to read MapInfo .tab files in ArcPy?

I want to use arcpy (the ESRI install of python 2.65) to analyse tab files...can this be done directly or do I need to convert them to shp files...if so would it be possible to do something like ...