0
votes
1answer
4 views

Split a shapefile into smaller files on linux command line

I have a shapefile which has ~350,000 entries. This is too big to handle. I'd like to split it into many smaller files, such that each file has 10,000 entries (this means there'd be ~350 shapefiles). ...
0
votes
0answers
2 views

Geoserver meta-tiling (tilesorigin)

I am trying to setup meta-tiling in Geoserver 2.8.0 (I can version up if necessary) in order to prevent multiple labels on polygons which span across tiles. I am using Leaflet (1.0 RC) on the client. ...
0
votes
0answers
8 views

Can the variants of Leaflet from Esri and MapBox be used without their respective products? [on hold]

Can the variants of Leaflet from Esri and MapBox be used without their respective products? What are the differences between the standard Leaflet JS, and the variants from companies like ESRI and ...
2
votes
0answers
34 views

Reading Jp2 compression level using ArcPy?

Is the compression quality level used to create a JPEG2000 image stored somewhere inside the file, and how to read it? I would like to know if my images where generated using a lossless compression ...
4
votes
1answer
1k views

Microsoft Surface vs. iPad for mapping

I was recently introduced to the Avenza PDF app for iPad and I've been using it in the company I work for to help our field crews find their way around, and record waypoints and tracks. The app takes ...
1
vote
1answer
12 views

QGIS QImage, can't specify a specific path

I'm a newbie in QGIS and I have to write a small python script to automate shapefile loading, applying style and save image. I'm having trouble on this last item. Here is the thing: ...
12
votes
5answers
8k views

Using SRTM Global DEM for Slope calculation?

I have downloaded SRTM GDEM (~90 km resolution). I am using ArcGIS 10. I have tried to use spatial analyst to compute for slope. However, I can not compute for the slope. The output values has ...
1
vote
1answer
23 views

Convert SHP to DGN with ogr2ogr

I want to convert my shp layers into one DGN file using ogr2ogr (QGIS). When I use this tool, I can only select one layer to convert. My problem is I don't know how to select all three layers at the ...
1
vote
1answer
11 views

How to load the only selected features from the layer in postgresql to Qgis canvas

I am using the uri to load the layer from the postgres to qgis canvas but it is not loading the selected features without where condition it is loading the lAYER. canvas = ...
-1
votes
0answers
14 views

Import prj tfw map and tif files iOS [on hold]

I am beginner in GIS and I need to create iOS application which will allow to view information from .prj, .map, .tfw and .tif files. I don't know if it is possible to import these files into arcGis ...
1
vote
1answer
22 views

Zonal Statistics ArcMap 10.4

I have a problem using Zonal statistics in python using ArcMap 10.4. This is a completely random error, and I have no idea what to do. Some back ground is that I have been running a script doing ...
0
votes
0answers
5 views

How can you auto-populate field using spatial location of another feature and its attributes? using javascript

IF the polygon feature present in region"A" then we have moved to another location let it be "B".So the moved feature should get the region name as "B" by automatically as when we moved ,it might get ...
1
vote
1answer
20 views

Custom rotated polygon labels in ArcMap

Can the following be done in ArcMap? It should be formula based without manual formatting as performed by my predecessor to get the following output. So Grave_No on right parallel to the y axis ...
2
votes
1answer
924 views

How to change Geoserver Mapfish print option from pdf to gif

I am an absolute novice when it comes to Geoserver and Mapfish but have set myself the task of obtaining a GIF print output rather than PDF. From reading documentation and forums it seems this is ...
0
votes
0answers
19 views

Which language to learn to create a GPS based map - which will allow users to share Eastings/Northings [on hold]

I am relatively new to GIS, Programming and phone app development. I would love a little help with the following questions: Which programming language would most best fit my requirements? (I am ...
1
vote
1answer
17 views

Creating weighted lines on map in CartoDB

I am trying to illustrate global trade flows within CartoDb. Flows are visualized by a line connecting two lat/long points on a map. The size of the flow would be represented by the width of the line. ...
0
votes
0answers
17 views

Matching image with legend and changing it to a raster layer [on hold]

I am new to GIS. I am trying to match the colour of the image: With ones in this legend : So that I can have a raster layer with these specific values, matching the legend, could this be done ...
1
vote
1answer
209 views

Setting transparency of layer group with Python in QGIS?

How can I set the transparency for all layers within a group of layers? I assume this will require the use of a FOR loop in the Python Console. Based on How to set the transparency for multiple ...
1
vote
1answer
31 views

Printing map portions one by one in QGIS?

I am using QGIS 2.14.2 and I have a map divided into different regions. Each piece have a number assigned (eg. 27). I have a page configured for printing the region (territory) along with 4 pieces of ...
0
votes
0answers
10 views

Collector for ArcGIS Invalid Token IOS

I'm having this issue while adding or updating a point on collector , on IOS devices only. Everything is working fine on Android and Windows 10! Error Message Pop-up: Cannot update.. Invalid ...
5
votes
3answers
2k views

How to set the transparency for multiple layers or add a global transparancy preference?

How can I set the transparency to 27 % for all 245 layers in QGIS? The only way I know of is by right clicking on the layer name, selecting Properties, then Transparency and then moving the ...
0
votes
1answer
24 views

How do I populate one attributes table column based on a value from another column? Qgis

I am trying to populate all data points with an elevation based on the fid. Basically, all fid's of 0 have an elevation of 1700, all fid's of 1 have an elevation of 1740 (there are 48 fid's) ... There ...
0
votes
0answers
11 views

Faulty behavior after a cut operation

Short explanation of my problem: On the picture two polygons are shown. The highlighted (yellow) polygon is above the green polygon. Now, two operations are performed. ...
0
votes
0answers
234 views

Custom Markers (overlay) changing position with zoom (Google Maps-Javascript)

I've created a Google map with custom html overlay markers with a function for the user to click on the marker to enlarge it and show more text and a button to exit back to the small marker (same html ...
3
votes
1answer
67 views

Selection by adjacent polygon features

I have a large polygon shapefile with lots of features from a model output, I need to remove anomalous features which are joined by a single vertex and part of a cluster of two. (example highlighted ...
0
votes
1answer
17 views

Changing units project wide from 'Millimeter' to 'Map Units'

All my units in my project are in millimeter. But I would like to switch all units to map units at once without clicking every single signature. I also would like to have the possibility to directly ...
0
votes
1answer
9 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 ...
2
votes
1answer
285 views

How to re-register a one way replica geodatabase

Long story short. Arcmap crashed during one of my regular synchronizations of a replica geodatabase created through one-way replication checkout. Upon reloading it seems to have unregistered the ...
1
vote
1answer
53 views

Why is the heatmap color not showing in TileMill?

I created a heatmap on QGIS (2.8) and styled it using singleband pseudocolor. I want to turn it into map tiles, so I added the TIFF as a layer in TileMill. However, when it's in TileMill, it loses ...
0
votes
0answers
69 views

How to get number of pixels between two points

I am working with the simple app which is using leaflet plugins.... I want to get the number of pixels when i draw a poly-line on map(from one point to another using poly-lines).... Actually i don't ...
0
votes
0answers
18 views

Is it possible to use pgsql2shp utility in PL/pgsql environment?

I intend to use PL/pgSQL to generate calculation points on streets with respect to address locations. I am aware that using pgsql2shp utility, a shapefile can be generate using postgis query. I was ...
1
vote
1answer
488 views

Error in Select Numeric type column in pyodbc with ArcCatalog?

I created a python script that uses "pyodbc" plugin to connect a SQL Server database and write out data. It was imported in an ArcGIS 10.1 tool and run from there. try: arcpy.AddMessage('FLAG 0') ...
0
votes
0answers
8 views

calculate Temperature Difference Vegetation Index

I have used temporal Landsat 5 TM images of 7 years period.I want to calculate soil moisture change using Sandholt et al. (2002) triangle method using Arcmap. I have extracted NDVI and respective ...
3
votes
2answers
564 views

Chinese characters appear in attribute table

I am running QGIS 2.4 on a mac, and all of the text in my attribute tables appears in Chinese. I've tried uninstalling and re-installing, changing the locale to U.S. English, and nothing helps. I've ...
1
vote
2answers
22 views

QGIS On the fly reprojection issue

i'm having an issue with QGIS 2.14.3 (Windows 10). I've two layers: PostGIS table (EPSG:23030) Shapefile (EPSG:25830) I setup on the fly transformation (23030) in QGIS, just for check, but both ...
13
votes
6answers
12k views

Why do OpenLayers layers appear shifted in map composer?

I'm having trouble with the OpenLayers Plugin of Qgis and the map composer: If I create an OSM-background layer and if I want to export this, the OSM-Layer looks perfectly all right in the normal ...
0
votes
1answer
21 views

QGIS raster calculator: difference gives NaN for Landsat 8 scene

I'm strugling with the QGIS Raster Calculator, trying to get a NDVI image from a Landsat 8 scene (path 222, row 84, date 2015-11-15). The problem is, I'm consistently getting NaN values for all the ...
0
votes
1answer
215 views

Cannot install node-mapnik on Windows 2008 x64

I have been spending the last few days trying to get node-mapnik running but with no success. Initially inspired by Wilhelm Berg's demo (https://www.youtube.com/watch?v=GlTaRpg3CbQ) which renders ...
3
votes
4answers
164 views

How to fill in a polygon with a lot of holes in it? Arcmap 10.3

I have a lake map layer that mistook algae for land and now some of my lakes have a a lot of hole in them and I don't want these holes. I also don't want to delete Islands and I have a lot of lakes.
2
votes
2answers
30 views

postgis How can I obtain directional buffer?

I have a geometry (polygon) which I want to extend with a buffer while testing on it in a where clause. The problem is that I would like the buffer to be only applied according to one or more ...
0
votes
0answers
5 views

how to add image links in Geo json object toget the images in pop up using openlayers 3

presently Iam working On Openlayers 3. I have added a geojson file to my map. when i click on a geojson feature iam getting a pop up which is displaying geometry and co ordinate values.i want to ...
5
votes
1answer
647 views

How to add GML files in geoserver 2.2.2?

How can I add GML files to a GeoServer 2.2.2 instance? How can edit them "on the fly" and save the results back to the server using OpenLayers? I would appreciate examples if possible. I'm adding a ...
0
votes
0answers
14 views

Create user defined file output location for geoprocessing on ArcGIS for Server 10.3

I am working on a geoprocessing service that allows a user to interactively select shapes and then download a .dbf file of the selected shapes. The tool was created in modelbuilder and uses the copy ...
1
vote
1answer
28 views

Finding tool to divide polygon into specific areas in ArcGIS?

I am using ArcGIS 10.3.1 and am trying to divide a polygon into several smaller polygons based on a percentage. I have found a theoretical answer How to divide a polygon into specific sizes using ...
3
votes
1answer
393 views

Leaflet.label and MarkerCluster problem with zoom dependent add/remove layers

Here's the setup: I have a leaflet map with point data, to which I have applied leaflet.label and leaflet.markercluster. I add the clustered point data at a particular zoom level (code below). All ...
2
votes
0answers
54 views

How to generate surfaces of different heights from LIDAR points

I am seeking a way to generate surfaces (polygons in a 3D space) of different heights from LIDAR point clouds.The typical application is like roofs, which may include holes, due to different heights. ...
1
vote
2answers
30 views

How to optimize QgsFeatureRequest with filter expression

I have a point PostGIS layer (my_layer) which has more than 66000 features. I am getting the features I want but it takes too long. My code is: resultList = [] req = ...
4
votes
1answer
277 views

Call ArcGIS Server Buffer command without using SOM

All, I wanted to see what the best way was of calling the geometry service to carry out a Buffer operation on ArcGIS Server 10, without using the SOM. Ideally I want to consume the REST API, using a ...
1
vote
0answers
52 views

Custom labeling with same angle as rectangular object and specific position using QGIS?

Can the following be done in QGIS? It should be formula based without manual formatting as performed by my predecessor to get the following output. So Grave_No on right parallel to the y axis of ...
1
vote
1answer
253 views

How to locate the WMS on a ESRI basemap?

I need to locate the WMS (not WMTS) for the following ESRI Ocean Basemap for use in a WMS only application: http://goto.arcgisonline.com/maps/Ocean_Basemap Is this possible?

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