1
vote
1answer
899 views

Recovering shape layer which was accidentally overwritten?

I duplicated a layer set, as it was more convenient (same style and attributes). It was working fine and both the original and new layers were showing. Then I open it up another day and the original ...
0
votes
1answer
23 views

Create 1' Contours Using Bare Earth Lidar .XYZI Point Data

I have 42 tiles of Lidar .XYZI point data containing approximately 800,000 points each and i need to create 1' contours out of the data. I have access to ArcMAP 10.3 and the 3D Analyst and Spatial ...
1
vote
1answer
313 views

What to use as split field or target workspace with Split tool?

I'm trying to use the split tool in arcgis 10.1 but I dont know what I should use as the split field or my target workspace. W:\S&P\s&p techs\Emily\Geodatabase\Geodatabase.gdb this is what I ...
1
vote
0answers
36 views

How to find the coordinate system info from a LAS/Lidar file with python?

I found several examples of how one can query and manually set a coordinate system on a tif/raster file (GDAL/Python: How do I get coordinate system name from SpatialReference? or Is it possible to ...
0
votes
1answer
20 views

Make certain countries visible on Carto map

I want to show only APAC countries on the carto map. I re-wrote my SQL query (see below) and clicked 'create a dataset from query'. Although the countries specified were coded in colors, those outside ...
2
votes
1answer
53 views

ESRI ArcMap 10.0 Not Compressing

We have ESRI ArcMap 10.0 (build 4400) ArcGIS Desktop 10 Service Pack 5. SQL Database 10.0.4000. We are trying to Compress our Versioned tables but for some reason it's not pulling the changed records ...
1
vote
2answers
33 views

Can't normalize LiDAR point cloud with lasheight and -replace z (LAStools)

When I try to use lasheight with -replace z to normalize the point cloud, the height of points are changed (destroyed heights; see pictures below). Without using -replace z everything is ok, but the ...
1
vote
0answers
15 views

how to efficiently detect intersect between polygons?

So I'm trying to implement box selection in leaflet. Currently i'm using turf's intersects function to detect if the box intersects with any of my geojson polygon features. However, this is very ...
0
votes
0answers
26 views

How to remove the white border of polygons using QGIS

I use the graduated color style for the polygons. But there are white borders between polygons. I tried to set Border: transparant, Border stype: No pen, Border width: 0. It did not work. I found a ...
7
votes
2answers
199 views

What's the meaning of numbers before an EPSG code, e.g. the 6.9 in EPSG:6.9:4326?

A WFS server I was using offered boundaries data in the following EPSG codes: EPSG:6.9:27700 EPSG:6.9:4326 ...defined in the XML giveCapabilities spec like this: <DefaultCRS>urn:ogc:def:crs:...
2
votes
1answer
190 views

How do you create an ArcCatalog-friendly xml metadata file from a url metadata?

How do you take metadata information from a url like this and create an xml file that ArcCatalog's "import xml" metadata tool will accept? I have tried a few variations on pasting the url information ...
2
votes
1answer
49 views

Global temperature maps

Does anyone please knows where to get global surface temperature maps, yearly? I need separate map for each year from 2002 to 2012 shows the average surface temperature over the globe, would be great ...
0
votes
0answers
4 views

from Overpass-Api to CSV - some steps to achieve data

I need to have all the addresses of Car-dealer [occasion] and mechanics in France. How to achieve this - how to obtain the data? goal is to have the following [out:csv(::id,::type,"name","addr:...
2
votes
2answers
843 views

Erdas python scripting help

I want to write scripts for Erdas in Python. I downloaded some Python examples here but I could not make much. Where can I get the full Help material for Erdas python scripting?
2
votes
3answers
123 views

Leaflet/HTML/GeoJSON: How to put a pop-up on a geoJSON point?

I don't have much knowledge of HTML/JS/GeoJSON, and have made a webmap from trial and error with many different tutorials. I have tried leaflet's tutorials but cannot get the desired results. I have ...
1
vote
0answers
17 views

Process Landsat8 data in AWS S3 from EC2 instance

I'm wondering what is the best way of processing huge amounts of Landsat8 images stored in the AWS S3 buckets from an Ec2 instance located in the same availability zone. Should I download the scenes ...
1
vote
0answers
117 views

Difference in the elevations for the same building on two DSMs saved in *.asc and *.laz formats

The following question concern the same type of data as the one I've asked in Differences in the longitude and latitude between a LiDAR DSM and an optical image. Basically, I've downloaded a tile of ...
2
votes
1answer
35 views

Why do I get “Data source is invalid” error when calling method?

QGIS 2.14 on Windows 7. I'm trying to call a method in a python script from the QGIS python console. I've put the directory in which the scripts resides in the PYTHONPATH in both the windows system ...
2
votes
1answer
43 views

How to speed up QGIS vector clip?

I'm trying to clip a large polygon shapefile (nearly 440,000 features, 0.5GB) to a shapefile containing a single polygon. Both shapefiles use the same CRS (EPSG:27700). With QGIS, using Vector > ...
1
vote
0answers
23 views

How to move projects from a server to local hard disk or removable drive?

I have a QGIS project on a desktop that I need to move to a laptop to take into the field. Whilst in the office, both PCs talk to the project on server via a persistent mapped drive (L:) - ie. ...
0
votes
2answers
42 views

Is it possible to import a Shapefile from Manifold into QGIS with the same projection?

is it possible to import a shapefiles from manifold to Qgis with the same projection?
1
vote
2answers
557 views

How to connect an oracle 10g database to QGIS? (TNS:Could not resolve the connect identifier specified)

Trying to connect an oracle 10g database to QGIS. I'm getting the error below: ORA - 12154: TNS:Could not resolve the connect identifier specified Anybody ever seen this error, or could provide some ...
1
vote
0answers
23 views

Is there a way to have custom functions automatically load in QGIS on start up?

I have a custom function for the print composer that prints out copyrights, but every time I start QGIS up and go to the Print Composer for the first time, I have to the Insert Expression > Function ...
0
votes
0answers
3 views

Issues with downloading custom base maps to Navigator

Does anyone else have any issues with downloading custom base maps to Navigator? I've followed all of the steps and exercises from Esri to create and download a custom map to Navigator from ArcPro. ...
13
votes
3answers
10k views

How to create polygons with straight lines and right angles in QGIS?

I am running QGIS 1.7.0 on Mac OS X 10.6.8. When creating a polygon, how do I do it so that the lines are straight (90, 0 degrees, etc.) and when I create corners they can be right angles? For ...
5
votes
1answer
233 views

Permanent Histogram Stretch with QGIS or FWTools

Is there a way to permanently stretch a histogram of a raster within QGIS or gdal? I would like to stretch a satellite image with a Standard Deviation 2.5 stretch. I would prefer to use QGIS or ...
0
votes
0answers
19 views

Publish feature service with local file geodatabase rather than Oracle geodatabase [on hold]

How is it possible to publish the feature service from a local file geodatabase without publishing from and Enterprise geodatabase such as Oracle with ArcSDE supported. I am willing to copy my data to ...
1
vote
0answers
19 views

Javascript - barChart not filtered on click of geoChoroplethChart

I have a choropleth map of counties, and a bar chart showing population of each county on the map. When I click on the bar chart the map is filtered and redrawn to show the selected bar, but when I ...
4
votes
2answers
1k views

Why is Oracle Spatial Query Layer Not Displaying in ArcMap?

I am having an issue with an Oracle query layer using SDO_Geometry not displaying. I have created a polygon layer/table within oracle, registered the table with the SDO_GEOM_METADATA and created a ...
1
vote
1answer
23 views

ESRI JS API - Get Data in Infowwindow when scrolling through multiple selected features

I would like to be able to grab attribute data from a popupwindow when its associated feature is clicked. When there is only one feature in the window this is no problem by accessing the features by: ...
1
vote
1answer
791 views

How to add Table View to Data Frame using ArcPy in ArcMap 10.0?

How does one add a table to the current map in ArcMap 10.0? 10.1 has the function arcpy.mapping.AddTableView, but this function does not exist in earlier versions. Must the table be made into a layer ...
2
votes
1answer
23 views

QGIS 2.14.4 attribute table fields not visible in Statist plugin

I had one point shapefile to which I joined new numerical attributes by a csv text file. I saved it by right clicking and everything works fine, I use it for calculations etc. But when I use the "...
0
votes
2answers
18 views

Source of radar imagery for coastal areas

For my final year research project I need radar images of coastal areas. And can anyone help me to find links where I can download such data free for research purposes?
1
vote
0answers
44 views

How to find Gaps between road segments in ArcGIS

I have huge data and want to find out gaps between segments. Although I have used Near tool and found some results but not a clear picture.
1
vote
0answers
17 views

Grid Reference autotext expression

I am trying to create some extremely user friendly print composer templates that have an awful lot of autotext data that updates for each composer without having to manually type it in. I ave done ...
1
vote
1answer
53 views

how to join a road network into as few lines as possible?

I am processing a polyline file that contains multiple lines representing city roads. I would like to join the lines together into as few lines as possible. I've tried using the 'join multiple lines' ...
1
vote
1answer
21 views

How to identify the co-ordinate system (CRS, SRS) of a GeoJSON file?

Suppose you have an arbitrary GeoJSON file, and the publisher didn't give much supporting documentation - or perhaps it's been provided by a third party who don't know much about it. Is there a ...
1
vote
1answer
222 views

Parsing large GeoJson geometry to WKT

I'm reading a very large json file as an InputStream in Android with JsonReader. This json has a geometry object like so.. "geometry":{ "type":"MultiPolygon", "coordinates":[ ...
1
vote
1answer
22 views

How to convert a string of coordinates to a readable polyline for export as a geojson

I need to take an xls file which has multiple columns of data, and a column called coordinates which is a string of coordinates (ex. 147.775364306,-20.49918551,0 147.776402476,-20.500021717,0 147....
0
votes
0answers
9 views

Address locator is using the chord of true curves instead of the actual line

I am setting up the addressing for my municipality, but when I try to assign the FromLeft, ToLeft ... etc, it assigns them along the chord of the curve instead of along the road centreline, which ...
0
votes
0answers
20 views

Interpreting Shapefile metadata to use in World File

Im currently using gdal/ogr to read metadata concerning shapefiles and I am able to read them correctly. I am also able to convert these shapefiles to tif using QGIS and now the next step I need is to ...
0
votes
0answers
13 views

How to add legend to rasterlayer in Qgis2Web plugin while exporting maps?

Is it possible to add a legend for Rasterlayer directly from the Qgis2Web Plugin or do I need to add the code manually?
4
votes
0answers
40 views
+50

Problem executing vectorgrid (from processing) in a standalone script using QGIS 2.8.6

I have the following piece of code which I execute within QGIS 2.8.6 import processing import ogr restrLayer = QgsVectorLayer("/home/usr/Desktop/trial/EligibleAreas_polygons_filtered.shp", "...
0
votes
1answer
21 views

OSM - tiles and .osm file

I'm working on mobile app and I want to use OSM as its free solution. Whats the purpose of application? User is geotargeted and the map like this: http://mc.bbbike.org/mc/ appears. No POI, buildings ...
0
votes
1answer
23 views

GeoDjango - faster way to use polygon.crosses?

I have a polygon and a line segment. I want to know if the line segment is both inside and outsize the polygon. Using "prepared" has helped but it's still no where near fast enough. how can i speed ...
2
votes
1answer
110 views

Finding list of all shapefiles that overlap with single shapefile using QGIS?

I have a list of 34 shapefiles. These shapefiles are range maps for different species. I would like to take 4 of these shapefiles and document a list of those shapefiles (within the 30 shapefiles), ...
2
votes
1answer
213 views

How do I transform a point using NetTopologySuite?

I'm exploring how we can use NetTopologySuite to address a geoprocessing task. based on some code sample I found, I was able to piece together a sample application that reads a shapefile and checks if ...
0
votes
0answers
3 views

problem in runtime substitution of mapserver-cgi

I did this. But nothing is viewed. here is the relevant part of my map file. VALIDATION 'yuk' '^[0-9]{1,2}$' END CLASS EXPRESSION ([pixel] >= '%yuk%') STYLE ...
2
votes
3answers
307 views

Drawing box arround text in OpenLayers 3?

I need text labels with surrounding a box and a specific fill color. Actually I have the following function which only shows the text but I don't know how to draw a box around the text. Text length is ...
1
vote
2answers
53 views

Add attributes to layer

I'm trying to add a new attribute to a vector layer in my plugin. But it does not work.. Why? selectedLayerIndex = self.dlg.comboBox.currentIndex() selectedLayer = layers[selectedLayerIndex] name = "...

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