0
votes
0answers
13 views

Is georeferencing a non spatial jpeg image necessary

I an a new QGIS user and I read that to be able to have a geometric coordinate you have to georeference that raster files first before you digitize it. Is it possible to have a coordinate without ...
0
votes
0answers
4 views

Why distance calculated via pixel size in GeoTiff (EPSG:3857) not equal to Google map or ::skyglyph distance?

Please, help to understand what wrong with distance calculated via pixel size. I try to calculate vertical size of GeoTIFF with EPSG:3857. Vertical size in pixels is 4001 pixels and in map units is ...
0
votes
0answers
6 views

ST_Distance between ST_Centroid and ST_Y

I'm trying to make a ST_Distance between a ST_Centroid and a ST_Y... But ST_Centroid is a geometry and ST_Y is a float. How can I make this? My query: SELECT ...
0
votes
0answers
5 views

Convert 5-digit string number into a readable date in CartoDB

Based on a couple of assumptions here 1) I have about 6 clean formatted date columns imported from Excel that CartoDB converted into 5-digit strings. I cannot select 'date' in the column label. 2) ...
0
votes
0answers
4 views

specify the bounding box for gdal2tiles

I want to generate tiles for an PNG file. In the MapTiler(GUI wrapper of gdal2tile), I can specify the bounding box and the zoom level, then it does the good job, which generates the tiles only for ...
0
votes
0answers
10 views

Two layers of the same region with the same coordinate system does not lay in the same place! [duplicate]

I know that my problem seems to be frequent but I couldn't find any good till answer. I have two layers for the same place (area and roads) in my ArcGIS, both of them has the same coordinate system ...
0
votes
0answers
15 views

Kernel density estimation

I am using ArcGIS 10.2.2, I am trying to run Kernel Density Estimation on roads to Identify Car Crash hotspots, with ArcGIS 9.3 there is an option "Analysis mask" that one can use so that the ...
0
votes
0answers
16 views

QGIS Mean coordinates, very slow?

I use Mean coordinates tool for a layer where the UID is a string and weights are real numbers. I find it very slow (literally hanging QGIS for few minutes) when processing datasets of more than few ...
-1
votes
0answers
12 views

Programmatically modifying “Pooling” parameter of ArcGIS 10.3 Server Service? [on hold]

I would like to relieve my Windows server on which ArcGIS 10.3.1 for Server is installed by altering the "Pooling" setting. I would like to set all 100 Services to "minimum Nr of instances per ...
0
votes
0answers
6 views

QGIS Qt Designer set current date and time in mask

I have created an input mask for QGIS using the Qt Designer. Everything works fine but I have a small issue with the date, the time and the date/time edit widget. Is there any way to display the ...
2
votes
1answer
34 views

How to create a custom coordinate grid in the QGIS 2.14.2?

I want to create a custom grid different from latitude / longitude, with letters and numbers on the axes. X = A, B, C, D, D, ... Y = 1, 2, 3, 4, 5, ... A B C D E 1 2 3 A B C D E I also ...
1
vote
1answer
19 views

ST_LocateAlong interpolation: difference between PostGIS and Spatialite

In a previous question, I discovered that ST_LocateAlong along a LineStringM is not implemented the same way in Spatialite than in PostGIS. While PostGIS interpolates between measures, this is not ...
0
votes
0answers
9 views

Building Overviews - Tiled vs Single GeoTiff

I've been running some tests on a sample dataset to compare file sizes and ran into an interesting situation that I'm struggling to understand. Sample Dataset: Single Orthomosaic Tile = 3.0GB - ...
0
votes
0answers
14 views

Qgis map is disfunctional

Of recent I have this problem with Qgis 2.14 that my map composer won't produce a map of my project but instead it goes all blank. I even used 2.12 and even after uninstall/install the problem still ...
1
vote
2answers
19 views

QGIS 2.12/14 Add GPS Point missing geography

I am trying to use the integrated GPS module from QGIS to add data points to a shapefile while in the field. I managed to get the connection between qgis and the gps working and my location is shown ...
-7
votes
0answers
35 views

GIS and Mapping Consultancy [on hold]

I am already running my own private firm "GIS and Mapping Consultancy" as i have done with few low cost projects. i have purchased different softwares, hardwares and other surveying equipments. can ...
2
votes
1answer
25 views

Dynamic Linear Referencing of events in QGIS from Excel or CSV using virtual layer

I have a PostGIS table with a geometry type LINESTRING M to represent routes. Here is the table specification: CREATE TABLE routes ( fid serial PRIMARY KEY, r_name text NOT NULL, geom ...
0
votes
1answer
25 views

Digitizing jpeg image or georeferencing it first?

I'm a new learner when it comes to QGIS. I have a jpeg image and I want to convert it into a shapefile. The problem is when I polygnized it, the resulting image is inverted. So i decided to just ...
0
votes
0answers
15 views

XY to Line tool

I wish to generate line with approximately 4061 xy coordinate from .csv file. However when i tried to execute using the xy to line tool the resulted map(photo 1) only showed half of the coordinate and ...
1
vote
1answer
24 views

Why changes made in QtDeisgner form not shown in QGIS plugin gui?

I have created a plugin in QGIS 2.10.1. After making some modifications in the ui file in Qt Designer and reloaded the plugin or restarted QGIS or restarted the pc these are not incorporated. I cannot ...
2
votes
1answer
25 views

Exceptions for invalid files/ filenames that already exist in database

The script below is functional, but it runs into issues if it comes across duplicate files (even when overwriteOutput=True) and corrupt shapefiles when running feature to feature. Are there ...
0
votes
0answers
7 views

Exporting multiple layers to single dxf file using Grass GIS?

I'm very new to Grass GIS. I need to export multiple vector layers into a single dxf file (required in order to import into another application). However, I can't see a way of selecting more than ...
0
votes
0answers
3 views

How to add custom CSS class to leaflet tilelayer

I am working with mapbox.js and leaflet to create a map with a number of overlapping tilelayers. I want to apply some custom CSS to only selected tilelayers, and thus assign these layers to an ...
0
votes
1answer
20 views

Feature Class to Feature Class using os.walk, fnmatch and renaming

I have a script for traversing a directory tree and finding shapefiles with a particular name. The issue I'm having is that the shapefiles are named improperly for databasing i.e. ...
0
votes
1answer
33 views

QGIS Processing Toolbox not valid

I have a 64 bit windows 10 computer with ArcGis 10.2.2 Installed. I just downloaded QGIS the newest version 2.14 64 bit. it downloads but the processing toolbox throws this error Couldn't load ...
0
votes
1answer
13 views

Error operating on file using grass

from grass.pygrass.modules.shortcuts import raster as r gscript.run_command('g.region', ...
1
vote
0answers
9 views

ArcGIS desktop 10.3: Is it possible to have all popups showing at once when exporting/printing?

I'm very new to ArcGIS software, and I need a map to look like this map I drew on in MS Paint, with multiple popups showing. Is there any easy, user-friendly way of going about doing that with ArcGIS ...
3
votes
1answer
32 views

Converting python script to toolbox?

I am trying to convert my plain python script to script in ArcToolbox to share, where user can set input data (in this case, feature class). Unfortunately, Converting Python (ArcPy) script into tool ...
0
votes
1answer
9 views

How so I solve FDO error: 0?

I used python add in to make a tool bar in Arcmap that edits features on a map. It works on a file geodatabase, but not on an ArcSDE version one. I've been getting an FDO error: 0. The potential ...
0
votes
0answers
9 views

path in openstreetmap or google maps based on path in svg [on hold]

I'm about to create an application that should try to create a path in openstreetmap or google maps based on a given path in a svg. For example, I've got the following svg: What tools to use and ...
1
vote
0answers
14 views

Exporting Data Driven pages as JPEG with World File

I have a script that works to export my pages as jpegs, but I want to add the world file to them. I don't want to have to do all the {df} args and whatnot, I just want to skip to the world file. How ...
0
votes
0answers
8 views

How much error is should occur when using WGS84 to ECEF coordinates?

I am creating geoinformatics software and have found the appropriate formulas for converting Wgs84 to ECEF. I've checked my outputs against various sources and they seem to be correct. However the ...
0
votes
0answers
14 views

raster::intersect not producing expected results

I am having trouble with "R's raster::interesect. I give interesect a SpatialPolygonsDataFrame and SpatialPoints as documented in the Raster Vignette (p 111). The result acts like it ignores second ...
0
votes
1answer
17 views

Current Global Climate Dataset

I am looking for gridded Current Global Climate Datasets (Mean Temperature and Precipitation) at 30 second resolution? Can anyone guide me to get it.?
0
votes
0answers
12 views

Arcmap - add an image to a legend that is not part of layer symbology

I am making a simple map, showing store locations on a background. Each store brand is displayed with an image (a coloured square with a letter e.g. Aldi might be a blue square with the letter "A" ...
0
votes
0answers
13 views

Working out meter accuracy based on number of visible GPS satellites?

I am working with NMEA data and I curious whether there it is possible to calculate the accuracy, in metres, based on the number of visible satellites or whether there is an alternative way? The two ...
0
votes
1answer
12 views

How to Get Dynamic Map Service Layer Name On ArcGIS API

Can you please take a look at This Demo and let me know how I can get the Selected Layer Name through API when check boxes are checked? As you can see at This Link the service is providing 3 layers ...
0
votes
0answers
17 views

Adjusting labels in for stationing

How do I update labels for stationing? I am using the "Station Lines" plug in which is great, but I need the labels to read 01+00, 02+00.... as opposed to 1,2..... Also, can I start this labeling ...
0
votes
2answers
13 views

Where do I find city/town point locations in US census data?

I'm generating RF propagation maps with Splat!. It can plot cities (as points) on its coverage map. It comes with a tool to import ASCII Arc/Info Ungenerate files. These used to be available from the ...
0
votes
0answers
23 views

ArcGIS 10.2 layers in data view but not in layout view or table of contents

This is a bit of a difficult question to ask, and I've never encountered this problem before nor can I find any resources for help. I have spent considerable time editing line feature classes in one ...
0
votes
0answers
6 views

Export User Statistics from ArcGIS Online

Is there any way to export usage statistics to csv from an ArcGIS Online institutional account? I would specifically like to be able to identify the number of times logging in or total time logged in ...
0
votes
0answers
12 views

“ QFSFileEngine::open: No file name specified ” installing QGIS Server on Windows 2012R2

I am attempting to get QGIS Server installed on a Windows 2012 R2 Server. After following the information at the https://anitagraser.com/2012/04/06/qgis-server-on-windows7-step-by-step/, and looking ...
0
votes
0answers
17 views

Combining hyperspectral bands to form a multispectral image?

I understand that the difference between the two are the number and width of the bands. Given a hyperspectral image, is it possible to 'convert' it to multispectral ? In this paper for example, the ...
4
votes
1answer
40 views

Nested Con statement arcpy

I am trying to combine three conditions into one con statement line: ndvi_adjusted = Raster(ndvi_raw) * 0.004 - 0.08 con1 = Con(Raster(ndvi_adjusted) >= 0, ndvi_adjusted) con2 = Con(IsNull(con1), ...
0
votes
0answers
7 views

Connect ArcGIS dataset to JSON REST-based web service [on hold]

I am trying to connect my ArcGIS database to a JSON REST-based web service. I tried to use the "JSON to Feature" toolset, but probably since it needs to connect through an http link, it didn't go ...
0
votes
1answer
41 views

In Postgres how to create columns with geometry?

I have point data stored in the postgis server and I need to create a new table with their geometry values. How can I extract their coordinates and translate them into a table. Something like: ...
1
vote
1answer
37 views

Point buffer not round - jagged circle like thing

Any ideas why running a point buffer (50 and 150 meters) would result in this shape? ArcGIS 10.2 - All projections match
3
votes
1answer
22 views

Where are replicas stored in the Geodatabase?

I'm trying to verify that "unregistering" a replica from the Manage replicas dialog does, in fact, delete the replica. I looked for a table pertaining to replicas, but all I see is GDB_REPLICALOG. I ...
0
votes
0answers
10 views

convert SHP to DGN with ogr2ogr

I want to convert may shp layers into one DGN file using ogr2ogr (qgis). When I use this tool, I can only select one layer to convert it :/ my problem is I don't know how to select all my three layers ...
2
votes
1answer
13 views

Except from Hyperion do you know any other hyper-spectral satellites?

There aren't many images for my research area. So I am looking for other hyperspectral satellites. Or maybe another site except USGS? The area is near here "40.223124, 23.031155"

15 30 50 per page