0
votes
0answers
3 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
2 views

QGIS On the fly reprojection issue

i'm hving 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 ...
0
votes
0answers
9 views

Publicly accessible (near) real-time satellite imagery

The operators of the Himawari-8 weather satellite provide a fresh full-disc picture of Earth every 10 minutes. This is a great resource and powers applications such as RealEarth. Are there any other ...
0
votes
0answers
7 views

Meaning of visitor stats in CartoDB?

CartoDB helpfully shows a daily hit count for each map, but I can't find out how end of day is defined. I seem to get lots of hits "overnight" in UTC, and I swear the hit count for two days ago just ...
0
votes
1answer
14 views

Create map using Leaflet and JSON

I have a question in order to developing a web app using dynamic maps with JSON files. I'm using Visual Studio 2015 with MVC 5. At this moment i have developed complete app but I'm unable to draw ...
2
votes
2answers
17 views

Selecting polygons not covered by any other polygon (or BBox) in table in PostGIS?

In a table where many of the geometries might be completely covered by other ones, is there a query that selects only geometries that are not covered by any other geometry in the same table (excluding ...
0
votes
0answers
8 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 = ...
0
votes
0answers
13 views

How to automatically filter data from a table in the composer QGIS 2.14.2?

I have configured in the print composer 3 attribute tables with a filter to display values of a map. Currently the filter only shows the data area 27 and if I center the map to display another area ...
1
vote
0answers
14 views

How to generate surfaces of different heights from LIDAR points

I am seeking a way to generate surfaces of different heights from LIDAR point clouds.The typical application is like roofs, which may include holes, due to different heights. However, most tools, ...
0
votes
0answers
6 views

Oracle Spatial layer (polyline) not always displaying in ArcMap?

i'm using oracle spatial layers and connected them to ArcMap 10.1 as database connection as usual from catalog, i can access attributes all from spatial table, i have problem only displaying ...
0
votes
1answer
15 views

Analysis tools UPDATE not available

Why UPDATE from Analysis tools in ArcGIS 10.3.1 is not available to me, does it need some specific license or can it be download separately? How is it possible to achieve exactly the same result as ...
1
vote
0answers
15 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
8 views

Land surface temperature of LandSat 8?

I want to find land surface temperature of landsat 8 data i used the image of month feb and i got two values high and low but the low value was in minus i performed again and again and facing the same ...
0
votes
0answers
13 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 ...
0
votes
0answers
15 views

Raster to vector data generation problem

I am trying to generate lee multiplier zone (see map please) from raster data using georeferencing and digitization. See this map only contains THREE layers! Lee Multiplier Coastal boundary Cities ...
0
votes
1answer
24 views

Attaching toolbar in QGIS?

I have a similar problem to Getting back to side bar after detaching layer panel?, but with toolbars. So I accidentally detached digitizing toolbar (and other toolbar as well), and cannot put it ...
1
vote
0answers
9 views

Create a correlation between different point dataset

I have different point data-sets in my map in ArcMap, but I am wondering if there is an tool in ArcMap that can analyze the correlation between the different data-sets. Specifically, I need to know ...
0
votes
0answers
8 views

PYQGIS Layer to KML?

I am aware that it is possible, in QGIS, to save your Vector Layer as a KML file manually, however, I want to know if there is anyway I can do this programmatically from an external Python Script that ...
0
votes
0answers
11 views

Privacy solution in a table view [on hold]

i have a table with two key columns, which are user and privacy. My idea is to write table view to query my table with reference to the relevant column. I want a table view which shows following: ...
0
votes
0answers
7 views

Storing temporal data in ArcGIS for Desktop? [on hold]

I have rainfall data that I want to incorporate in the analysis of a river network. Does anyone have a link to a short course on this material so I can fast-track my learning on this area?
0
votes
0answers
9 views

QGIS Line overlap itself [on hold]

How can I tell to QGIS that if a line intersect itself in one or more points it must consider as an overlap?
0
votes
1answer
8 views

where are GRID saga algorithms in saga 2.1.4?

I am a real newbie on QGIS and willing to draw contour maps from satellite, following the youtube videos. so now I have a table with all data, and following the video, I should use the SAGA tool GRID ...
1
vote
0answers
8 views

issue in DXF file

the problem of getting from DXF format, to display in QGIS correctly.we have loaded it in and fixed the rotation and TTF font mapping problems. That is all great however the objects are coming in ...
0
votes
0answers
7 views

Import prj tfw map and tif files iOS

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 ...
0
votes
0answers
3 views

How to overlay map with legand data on empty layer and export map on the other layer

Visit http://dev.openlayers.org/sandbox/camptocamp/canvas/openlayers/examples/exportMapCanvas.html How can i get the information about legand, for composing map do i need to follow any iso standards ...
0
votes
0answers
5 views

ArcGIS for Server Token expiring at midnight regardless of validity length? [on hold]

I have PRTG set up to monitor my ArcGIS 10.3.1 for Server services. In PRTG I have to define my server and set a sensors which are then checked periodically. I my case, for every AGS Service I test ...
0
votes
0answers
5 views

How can i search point of interest of city in openlayers by passing city name or lat,long

Visit https://help.openstreetmap.org/questions/37308/city-search-in-openlayers-openstreetmap I have gone to this link and executed its showing the city name before search also and for the json file i ...
0
votes
0answers
5 views

Use Graphic and Layer Transform to Calculate New Points in ArcGIS API for JavaScript

I have 4 graphics on map with 3 map points and a polyline. As I am scaling / rotating polyline with editor I want 3 map points to calculate its new position relatively to scale or rotation of ...
0
votes
0answers
15 views

Writing Geopackage with FME - no geometry

I have a large amount (400 shapefiles, 11 gigs total) of shapefiles which I would like to store into one file (or DB). I am also using PostGIS, but just out of pure interest I would like try test out ...
-3
votes
0answers
23 views

How to perform cut and fill volumetric analysis in ArcGIS? [on hold]

I have point cloud data with elevation values. I have converted the point cloud data into raster format consisting of elevation values. Now how can I perform cut and fill analysis using this generated ...
2
votes
1answer
21 views

How to Select a Polygon beneath another Polygon in QGIS 2.14

We have a series of layers that contain polygons with additional polygons 'underneath' each polygon. How do we select the polygon beneath the existing feature without also selecting the feature ...
0
votes
0answers
14 views

QGIS error: 'NoneType' object has no attribute 'isGeosEmpty'. What's wrong with this union?

I'm trying to union two vectors. The red + grey polygon layers shown above. When I run union I get the following error: 'NoneType' object has no attribute 'isGeosEmpty'. Any help with what may be ...
0
votes
0answers
19 views

Get number of intersected points based on attribute [on hold]

I am trying to get a number of points in polygons based on row values, and write them into attribute table of polygons. I have polygon (Zones), and points (Objects with fields such as schools, ...
3
votes
1answer
60 views

Programmatically finding polygons which are are >90% overlapped by another vector polygon layer using QGIS?

I'm trying to figure out how to use python to extract the polygons in one vector that are overlapped by >90% by another vector. I would then like to have a vector/map that will only show those ...
3
votes
1answer
15 views

Plot a world heat map with mollweide projection in R

I have a data set with global observations with lat/lon information. There are 288 longitudes from -179.375 to 179.375 with spacing 1.25, 180 latitudes from -89.5 to 89.5 with spacing 1. There is one ...
1
vote
2answers
48 views

Determining curvature of polylines

I'm dealing with several thousand polylines of Geologic data with mixed degrees of curvature. I'm attempting to quantify just "how curved" these lines are and was curious if there was a means to do ...
0
votes
0answers
24 views

Selecting polygons below (downhill of) lines using ArcGIS for Desktop?

I am hoping to identify sections of a trail system which are close enough to potentially add sediments to wetlands downhill. To this end, I would like to select polygons (wetlands) that are a given ...
0
votes
1answer
40 views

Update rows based on other rows as script tool?

I am trying to convert python script to tool. Tool would update row values based on other row values. For example, if in row One values are Water, Rivers, Streams, in row Two, updated values would be ...
3
votes
0answers
20 views

using arcpy to convert labels to annotation

I am trying to use ArcPy to convert a specific shapefile in my TOC to annotation in the map. I am not so much in the need for the tiled annotation tool that I've seen talked about as this is going to ...
0
votes
1answer
19 views

Restore previous versions of Qgis file

I´m trying to recover a previous version of a Qgis file, because I started playing around with CRS, and saved the file and closed it, thinking next time it woud be easy to get everything back into ...
0
votes
1answer
16 views

Tile server on Windows? [on hold]

Unfortunately but i have to make a tile server on Windows system. I were already generated tiles. Now i want publish it. Tiles volume can be big - around city with city's local area. When i did same ...
0
votes
1answer
16 views

QGIS - Listing feature names as an attribute within a polygon

I have a number of polylines in QGIS that correspond to seismic SEGY files, and want to subset the dataset using a box/polygon that I make in QGIS. Is it possible to get the feature names that are ...
0
votes
0answers
11 views

can not find the route between two points

When I try to find the route between these two points 233.46362, 266.51697 and 290.34512, 330.4421 with this link it says {"error":{"code":400,"message":"Unable to complete ...
1
vote
0answers
27 views

How to convert Shapefile to KML in Python

My goal is to extract certain shapes from a shapefile, and render the chosen shapes in a KML file. From searching gis.stackexchange, I was able to piece together the necessary components, and the ...
0
votes
0answers
9 views

Documentation for folium

Where can one find the complete documentation for folium? Whenever I use some functions it shows that it was deprecated .How to know the deprecated methods and the replacement for them(along with the ...
0
votes
2answers
27 views

How can I find EPSG when it's not obvious from the .PRJ file?

Using Geoserver, I'm trying to get the correct projection for a map layer that is provided by the State of Idaho. I've tried looking up the EPSG code from http://prj2epsg.org/search. However, the ...
0
votes
0answers
20 views

Reading and writing block windows with Rasterio? [on hold]

I'm trying to go about reading large rasters by the block windows in Rasterio. Everything works and I can iterate and output the flat file for my coworkers, but I can't for the life of me figure out ...
0
votes
0answers
6 views

Loading a stateGeoJSON across countries

I am trying to build a chloropleth map in Javascript with zoom functionality. Map will need to have a chloropleth layer of all countries. On zooming in it will need to show a chloropleth of the next ...
1
vote
2answers
41 views

Remove small areas from SHP shapefile in Qgis? (Python R etc)

I have a very complex file showing remnant vegetation data. I wish to remove very small areas (preferably with a threshold that I can set) and generate a file that shows only larger blocks of ...
0
votes
1answer
18 views

Oracle versioned geodatabase feature class field value update on multiple versions

I have an Oracle enterprise geodatabase with multiple versions. In one field value of one point feature class I need to change all features within all versions. I have more than 50 versions. Is ...

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